He is a stereotypically over-exaggerated American Marine who fought in the United States Marine Corps, who was experimented on by Group 935. Following the zombie outbreak, Dempsey joined Edward Richtofen, Nikolai Belenski, and Takeo Masaki in fighitng against the horde while also evading the Demonic Announcer - Samantha Maxis. In the Primis storyline, Tank works with his allies in stopping the Apothicons, and later Dr. Monty from undoing reality.
Dempsey was born in the United States presumably during the 1900s, and later joined the United States Marine Corps during the height of the Second World War. After showing his prowess during the Battle of Peleliu, Tank was assigned to a special unit to find Peter McCaine, but was captured by the Germans and sent to Group 935 to be experimented on.
In Black Ops III, his Primis version serves as one of the four main protagonists of the Call of Duty Zombies storyline. He first met Richtofen at Northern France in 1918. He, along with Takeo, Nikolai, and Richtofen, helped free Samantha Maxis from Agartha. The union of the four marks the return of Primis, unbeknownst to them. Samantha then sends them to their next destination.
Dempsey, Takeo, and Nikolai learn about Richtofen's multi-dimensional travels, and try to stop him because they fear he will disrupt the continuity of the dimensions. They failed multiple times, but arrive at the Original Timeline where original Richtofen traps Samantha and her father in the teleporter. Primis Richtofen arrives later and kills his original self, and explains that there's a chain of events that must be set in motion by obtaining the other Ultimis souls.
They landed on the abandoned Group 935 fortress base but realized that Ultimis Dempsey is already going to the moon from the rocket. After making radio contact with Dr. Groph, Richtofen masquerades as his Ultimis older self in order to fool Groph. However, Groph becomes suspicious of Richtofen's change of personality and announces him as an imposter. Using the Death Ray, the young four manage to bring the rocket containing the Ultimis Dempsey back to the castle, much to Groph's anger, who activates a failsafe so they couldn't touch the chamber.
Using the Vril Device obtaining from the crash site, the young four awaken a ghost Keeper and help it return it to its physical form before it returns the favor and brings the M.P.D. from the Moon to the castle. However, the Keeper becomes corrupted, forcing the four to battle it, eventually defeating it. After defeating it, Groph expresses his extreme anger, vowing to destroy them and the castle itself. In order to tie up these loose ends, the four use the Summoning Key to launch several missiles towards the Moon, destroying it, ultimately destroying Griffin Station and killing any Group 935 scientist at the station, including Groph. Richtofen lets Dempsey kill Ultimis Dempsey and moved on to find Takeo 1.0 on the island of the Division 9 Facility.
Later, Richtofen was present when the Ultimis Takeo Masaki was cured from being a Thrasher to collect his soul. After the Ultimis Takeo honorably sacrificed himself for a better future, Richtofen then preserved his soul. The four went to Alcatraz island to gather the four blood vials from the four cursed prisoners. Then went to get Nikolai's soul in Stalingrad.
Upon seeing them the Ultimis Nikolai attempts to kill them until a dragon throws him into a building. After encountering SOPHIA, Richtofen and the group assist her in acquiring interdimensional travel knowledge, helping her to reunite with Maxis. Later, Richtofen and the others make a temporary truce with the Ultimis Nikolai in order to kill the dragon. Afterward, Richtofen and the other three demand Ultimis Nikolai to surrender to which he refuses and betrays them. After the Primis Nikolai kills his Ultimis self, Richtofen opens a portal in the sky with Maxis's help and lights a beacon from the Summoning Key which releases the Ultimis Nikolai, Takeo and Dempsey. After this, he says they will see Maxis soon.
The four gathered to go the house and meets Maxis. Richtofen shows the Summoning key to Maxis and showed Maxis the future of Element 115. Maxis grabs his axe and destroys the teleporter. Maxis then hear voices from the Basement and accidentally grabbed the Summoning key that preserved the Shadowman's soul. The Shadowman steals Maxis's body and releases his homeland to Dr. Monty's world. Richtofen and the three come back to the house and sees the Shadowman and his home world. The four gathered up one last time to fight the undead horde and the Apothicons.
After the Apothicons' defeat, Maxis in the Summoning Key sacrifices his life by putting The Dark Aether inside the Summoning key. Dr. Monty states that all the evil is gone forever, but tells the four that they're supposed to no longer exist. Thanks to the blood vials, they still exist. Richtofen states to send them a place where they never been. But Monty disagrees and tries to wipe them out, but changes his mind. The four turn into Primis and sent back in time where the Apothicons were defeated in the Middle Ages, completing the Cycle.
Dempsey, Nikolai, Richtofen and Takeo (The Dark Aether Versions) before greeting Grigori Weaver, Elizabeth Grey, Mackenzie Carver and Maya Aguinaldo in The Project Janus Towers aka Project Janus HQ in The Dark Aether.
Dempsey, Nikolai, Richtofen and Takeo (The Dark Aether Versions) greeting Grigori Weaver, Elizabeth Grey, Mackenzie Carver and Maya Aguinaldo in The Project Janus Towers aka Project Janus HQ in The Dark Aether.
Dempsey, Nikolai, Richtofen and Takeo before meeting Weaver, Grey, Carver and Maya.
Dempsey, Nikolai, Richtofen and Takeo meeting Weaver, Grey, Carver and Maya.
Dempsey, Nikolai, Richtofen and Takeo after meeting Weaver, Grey, Carver and Maya.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya interrupted and distracted by The Warden's voice echo.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya hearing The Warden's voice echo.
Dempsey, Nikolai, Richtofen and Takeo still hearing The Warden's voice echo while confused.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya witnessing The Warden showing up with two skulls with two cages connected to two chains on his hands while asking him who he is.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya witnessing The Warden putting down the skull in a chain cage.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya's moments before getting their life essences absorbed by The Warden.
Dempsey, Nikolai and Richtofen shocked before getting their life essences violently and painfully absorbed by The Warden.
Dempsey, Nikolai, Richtofen and Takeo getting their life essences violently and painfully absorbed by The Warden.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya gets their life essence absorbed by The Warden.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya gets their life essences absorbed violently and painfully by The Warden.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya after getting their life essence absorbed by The Warden as he leaves via portal.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya witnessing The Warden leaving via portal.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya seeing The Warden leave the Dark Aether version of Janus Towers.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya witnessing the waves of Zombies coming out of nowhere.
Dempsey, Nikolai and Richtofen witnessing Zombies swarming to attack The Ex-Requiem Crew and The Dark Aether Crew.
Dempsey, Nikolai, Richtofen and Takeo killing Zombies.
Dempsey and Carver fire their weapons at the undead horde of Zombies.
Dempsey and Grey kill the zombie as Richtofen witnesses while he finds the entrance front doors in Janus Towers Lobby.
Dempsey and Grey eliminate the undead zombies.
Dempsey and Grey vault the area while Weaver and Nikolai shoots two zombies while facing each other via eye to eye and face to face.
Dempsey, Grey and Carver vault the area while eliminating the undead zombies.
Dempsey, Grey, Carver, Weaver and Nikolai shoot the undead zombies while Richtofen rushes to the entrance door from Janus Towers.
Dempsey and Carver shoots the undead waves of zombies as Richtofen opens the entrance door to allow Grey and others to exit The Janus Towers Lobby.
Dempsey is handed a light machine gun offered by Carver after Weaver, Maya, Richtofen and others regain their bearings after eliminating the undead hordes.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya preparing to face the threats while hearing The Warden's voice echo to escape from The Warden.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya in The Dark Aether.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya located T.E.D.D.'s head on the floor.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya putting T.E.D.D.'s head in The Ol' Tessie Truck.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya still upgrading The Ol' Tessie Truck.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya located Klaus in a cell in Ashwood.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya goes face to face against an Uber Klaus.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya Vs. The Uber Klaus.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya before Klaus exits the cell in Ashwood via Stabilizer Chip.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya witnessing Klaus exiting the cell in Ashwood.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya witnessing Klaus shooting the undead horde of Zombies after exiting the cell in Ashwood.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya alongside Klaus unlocked the safe and retrieve The Aether Barrel.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya unlocked The Cub with Alchemical Symbols and Runes to obtain The Necrofluid Gauntlet.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya retrieves The Necrofluid Gauntlet.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya creates The Serum with Widows Lantern, Mysterious Limb, Ravager Eyes, Hoard Hunk Chucks and Human Bones and added blood and other ingredients successfully.
Dempsey retrieving his dog tags while remembering The Vietnam War inside the crashed rocket next to Zarya Cosmodrome.
Dempsey hearing his echoed flashbacks from The Vietnam War, Weaver from his universe with two eyes, CIA, The Office of Requiem, Oskar Strauss, Veytharion in his memories in The Abandoned Temple, The Artifact, remembering the horde of zombies, becoming a war hero while Veytharion is speaking to him about his past.
Dempsey as a Disciple Killing all Zombies via being the vessel, a survivor and War Hero.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya unlocking The Seal of Sorrow to Free The Entity via Bruin Key, Nightbird Key and Terrapin Key to remove the chains.
Dempsey, Takeo, Carver and Maya witness The Entity being released from The Seal of Sorrow.
Dempsey, Maya and Takeo witnessing The Entity being released.
Dempsey, Nikolai, Richtofen, Takeo, Carver and Maya as The Entity realizes The Ex-Requiem Crew and The Dark Aether Crew are still alive, much to her approval.
Dempsey and Nikolai speaking to The Entity.
Dempsey, Maya, Weaver, Nikolai, Richtofen and Takeo informed by The Entity about The Warden absorbed the two crews life essences.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya continue to Listen to The Entity about The Warden and his plans about collecting Life Essence Souls and fighting against The Warden.
Dempsey, Takeo, Richtofen, Carver and Maya informed by The Entity about The Shadowsmiths, who are ancient immortal beings, the entity of great power to be in service of The Warden.
Dempsey, Richtofen, Takeo, Weaver, Grey and Carver informed by The Entity about The Shadowsmiths.
Dempsey informed by Maya about The Entity guiding the two crews.
Dempsey, Maya, Takeo and Nikolai being told by The Entity that she can guide the two crews hands to stop Veytharion and get their spiritus back.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya prepare to stop Veytharion and get their spiritus back.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya after finally upgrading The Ol' Tessie.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya after Launching The Soyuz Rocket During Project Thunder while witnessing at Zarya Cosmodrome.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya and Klaus at Blackwater Lake before entering The Floating Pyramid.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya face to face against Veytharion inside The Floating Pyramid.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya Vs. Veytharion.
Dempsey and Maya approaching Veytharion after defeating him and revealed his true form.
Dempsey and Maya willingly preparing to let Veytharion to get their spirituses back and get their memories back as Nikolai, Grey and two crews witness.
Dempsey and Maya readying to get their Spirituses and memories back.
Dempsey and Maya started to remember their memories by getting their spirituses back by Veytharion.
Dempsey remembering his service in The Vietnam War.
Dempsey remembers Weaver with two eyes in his universe.
Dempsey and Maya successfully got their spirituses and memories back in their bodies by Veytharion.
Dempsey asking Veytharion who he is after he and Maya got their spirituses and memories back.
Dempsey and Maya informed by Veytharion that he is a Shadowsmith and the bonds that imprisoned him are undone and became free before he vanishes.
Dempsey and Maya checked by Grey after the two got their spirituses back as Weaver, Carver, Nikolai and Richtofen witness.
Dempsey and Maya informed by Richtofen, Nikolai, Takeo and Ex Requiem about finding more of The Shadowsmiths.
Dempsey, Richtofen, Weaver, Maya teleported to outside of The Dark Aether.
Dempsey before getting teleported to outside of The Dark Aether, Richtofen, Takeo and Maya teleported to outside of The Dark Aether.
Dempsey being getting teleported to outside of The Dark Aether after Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya teleported to outside of The Dark Aether.
Dempsey, Takeo and Maya in the Ol' Tessie.
Dempsey, Takeo, Nikolai and Grey, Richtofen, Weaver, Carver and Maya prepare to fight off against The Ravagers.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya readying to attack The Ravagers while in the Ol' Tessie.
Dempsey, Grey, Takeo and Richtofen, Nikolai, Weaver, Carver and Maya eliminating the Ravagers.
Dempsey fires the DG-2 Turret while Grey and Takeo eliminate The Ravagers.
Dempsey opening fire at The Ravagers with a DG-2 Turret while using a War face aka War Cry as Grey witnesses.
Dempsey firing at The Ravagers with a DG-2 Turret while Takeo, Grey and Nikolai do the same while Carver and Maya remain in the backseat.
Dempsey, Maya, Weaver, Carver, Grey, Nikolai and Takeo in the Ol Tessie while eliminating The Ravager Hordes.
Dempsey, Maya, Weaver, Takeo, Nikolai, Grey, Carver and Richtofen driving while several Ravagers prepare to attack.
Dempsey, Nikolai, Takeo, Richtofen, Weaver, Maya, Carver and Grey's moments before The Ravagers attack the Ol' Tessie.
Dempsey is on the DG-2 Turret while Weaver kicks The Ravager with the car door.
Dempsey on the DG-2 Turret while Weaver shoots The Ravager off the Ol' Tessie with a Shotgun.
Dempsey, Nikolai, Grey, Weaver, Maya, Carver, Takeo and Richtofen in The Ol' Tessie while several more of The Ravagers are chasing.
Dempsey, Maya, Grey, Weaver, Nikolai and Richtofen still killing The Ravagers.
Dempsey, Takeo, Maya, Richtofen, Weaver, Carver and Grey fighting off The other Ravagers while Nikolai is hanging on to The Ol Tessie.
Dempsey and Takeo witnessing Grey shoots The Ravager while Nikolai is hanging on to The Ol' Tessie.
Dempsey, Nikolai, Weaver, Grey, Maya in The Ol' Tessie alongside Takeo before he enters back in while witnessing a Heavy Ravager Meteorite.
Dempsey, Nikolai, Takeo and Grey in The Ol' Tessie while seeing The Big Heavy Ravager Meteorite.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya after firing Rockets at The Ravagers.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya shielding their eyes after firing rockets at The Ravagers.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya in The Ol' Tessie entering The Skull Shaped Asteroid.
Dempsey, Takeo, Richtofen, Weaver and Carver after exiting The Ol' Tessie.
Dempsey, Maya, Weaver, Takeo and Richtofen readying to look at The Thurston Planetarium.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya after exiting The Ol' Tessie and preparing to observe The Thurston Planetarium.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya readying to observe The Thurston Planetarium.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya observing The Thurston Planetarium.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya at The Thurston Planetarium.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya preparing The Harmonic Oculus.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya destroys O.S.C.A.R. via Electro Volt Projector.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya after destroying O.S.C.A.R. with The Electro Volt Projector.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya destroying O.S.C.A.R. with a Harmonic Oculus Telescope Laser.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya destroying O.S.C.A.R. and prepares to retrieve The Little Green Menace-1 Wonder Weapon in The Museum Infinitum.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya looking at Josiah Shem's Ritual Dagger.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya looking at The Energetic Mineral Samples.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya preparing to Operate on Dr. Silias Thurston.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya defending The Perfusion Machine.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya looking at The Portrait of Josiah Shem.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya at The Archive of Orbis.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya completing The Machina Astralis correctly.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya defending the portal from O.S.C.A.R..
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya at Mars.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya activating The Perfusion Machine to The Terminal.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya fighting against Caltheris.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya Vs. Caltheris.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya encounter Caltheris as The Entity witnesses.
Dempsey and Nikolai corner Caltheris.
Dempsey, Maya, Carver, Takeo and Richtofen witnessing Nikolai preparing to confront Caltheris to give his life essence back.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya and The Entity after being informed by Caltheris that The Warden is here.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya and Caltheris witnessing The Entity being captured by The Warden.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya and Caltheris after The Entity is captured by The Warden.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya once again hearing The Warden's voice after freeing Veytharion and Caltheris from being enslaved by The Warden.
Dempsey, Nikolai and Grey hearing The Warden's Voice again.
Dempsey, Weaver, Takeo, Nikolai, Richtofen, Grey, Maya and Carver hearing The Warden's Voice.
Dempsey, Nikolai, Richtofen, Takeo, Weaver, Grey, Carver and Maya's moments before being captured by The Ravagers after The Warden barked orders to The Ravagers to take the two crews to an unknown location.
Dempsey, Weaver and Nikolai ambushed by The Ravagers.
Dempsey, Nikolai and Weaver start to eliminate The Ravagers while being captured.
Dempsey, Maya, Weaver, Grey, Carver, Takeo, Nikolai and Richtofen ambushed and captured by The Ravagers while eliminating them.
Dempsey, Maya, Weaver, Grey and Takeo grabbed and attacked by The Ravagers via ambush.
