Militaires Sans Frontières was a Private Military Company from "Metal Gear Solid: Peace Walker" and "Metal Gear Solid V: Ground Zeroes".

Militaires Sans Frontières (French for Soldiers Without Borders; lit. Military Without Frontiers), abbreviated as MSF and also known as Outer Heaven, was a private military company in the early 1970s founded and led by Big Boss. Because of their mercenary status, their questionable tactics on the battlefield, and their usage of an off-shore forwarding operating base in the middle of the Caribbean Sea during the early-to-mid 1970s, they were frequently referred to by their enemies as pirates.

They were succeeded by the Diamond Dogs.



After Snake abandoned the Patriots, he founded MSF to provide military force to anyone who needed it, regardless of nation or ideology.

Metal Gear Solid: Peace Walker

Metal Gear Solid V: Ground Zeroes



  • The name Militaires Sans Frontieres is a not the humanitarian organization Médecins Sans Frontières, which assists countries ravaged by war and epidemics that are in need of doctors and medical experts, with the fictional group being the military equivalent.
  • MSF is an early version of "Outer Heaven", Big Boss's concept of a nation of soldiers. While Outer Heaven ends up a terrorist organisation, due to Big Boss's descent into villany, MSF is on some level more well intentioned.


           Metal-gear-solid-wide.png Heroes

Metal Gear
Solid Snake | Gray Fox | FOXHOUND | Kyle Schneider | Diane | Ellen Madnar | Jennifer

Metal Gear 2: Solid Snake
Solid Snake | Colonel Campbell | Master Miller | George Kasler | Johan Jacobsen | FOXHOUND | Gustava Heffner

Metal Gear Solid
Solid Snake | Roy Campbell | Naomi Hunter | Mei Ling | Meryl Silverburgh | Nastasha Romanenko | | Miller | Otacon | Donald Anderson

Metal Gear Solid 2: Sons of Liberty
Raiden | Solid Snake | Roy Campbell | Otacon | Philanthropy | Peter Stillman | Rosemary

Metal Gear Solid 3: Snake Eater
Naked Snake | Signit | Eva | The Boss

Metal Gear Solid: Portable Ops
Naked Snake | Null | Roy Campbell | Python | Signit

Metal Gear Solid 4: Guns of the Patriots
Old Snake | Roy Campbell | Otacon | Raiden | Naomi Hunter | Rosemary | Mei Ling | Meryl Silverburgh | Sunny | Jonathan | Johnny Sasaki | Drebin 893 | Little John

Metal Gear Solid: Peace Walker
Snake/Big Boss | Kazuhira Miller | Paz Ortega Andrade | Amanda Valenciano Libre | Chico | Strangelove | Militaires Sans Frontières

Metal Gear Rising: Revengeance
Raiden | Boris Vyacheslavovich Popov | Kevin Washington | Courtney Collins | Maverick Security Consulting, Inc. | Blade Wolf | Sunny Emmerich | George

Metal Gear Solid V
Ground Zeroes
Big Boss | Kaz Miller | Militaires Sans Frontières | Paz Ortega Andrade | Chico
The Phantom Pain
Venom Snake | Kaz Miller | Diamond Dogs | Quiet | Code Talker | DD | D-Horse

Community content is available under CC-BY-SA unless otherwise noted.