Gears of War Wiki
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Stim projector equipped on JACK.

Stim (short for stimulation) is a healing projector aid used by the Coalition of Ordered Governments to heal injured Gears from afar in the middle of combat, via stimulating their immune system, blood flow and muscle reflexes. While it could heal bullet wounds and minor injuries; against more serious wounds, it is less effective.

COG Medics often carry equipment that has Stim.[1] In the post-Locust War, Stim could also be found used on JACK robots. In Gears 5, Stim is the second upgrade for JACK, which allows Delta Squad to survive attacks and protects them temproraily in a shield-like overlay, not unlike those projected from a Barrier.[2]


Stim is the quintessential 'healing' equipment for JACK. It allows JACK to heal damage, make one temporarily invincible for a short time and even revive downed squadmates. This makes Stim one of the most crucial and important abilities, especially on higher difficulties.

Fully upgraded, Stim could even increase the strength of the user, making their melee attacks far stronger than usual. The upgrades for Stim are:

Stim upgrades.

Faster Recharge[]

  • Stim recharges 25% faster


  • Increases Stim duration by 2 seconds


  • Stim can revive downed members of your squad


  • Melee damage is tripled while Stimmed


See Also[]

Behind the Scenes[]

  • Stim could be the Gears equivalent of an adrenaline shot.
  • It is unknown what Stim actually is. The Stim-Gas Grenade signify it is a gaseous healing agent, but the one on JACK is a projection of some sort. It may be that the Stim on JACK is a light projector based on the gaseous compound; a gaseous laser to say the least.
  • After the Evacuation of Settlement 2, JD is forced to wear a stim sleeve to keep his right arm intact and to minimize the pain of his inuries. Del can be heard talking to JD about the stim sleeve during an optional conversation in Vasgar after clearing some DeeBees from a loot cache near the Cosmodrome.

The Weapons and Equipment of Gears of War
Melee Weapons Chainsaw Bayonet · Combat Knife · Commando Knife · Machete · Powersaw
Rifles Designated Marksman Rifle · EMBAR Railgun · Enforcer Submachine Gun (Shock variant) · GZ18 Markza Sniper Rifle (Marksman variant) · Hunting Rifle · Musket · Longshot Sniper Rifle · Mark 1 Lancer Assault Rifle (Police variant) · Mark 2 Lancer Assault Rifle (Custom variant) · Mark 3 Lancer Assault Rifle (GL variant) · UIR Belt-fed Machine Gun
Shotguns Gnasher Shotgun · Overkill Shotgun · Sawed-Off Shotgun
Sidearms MX8 Snub Pistol · Talon Autopistol · Zapper
Grenades Beacon Grenade · Bolo Grenade · Cytostatic Gas Grenade · Flashbang · Incendiary Grenade · Molotov Cocktail · Shock Grenade · Smoke Grenade · Stim-Gas Grenade
Heavy Weapons Auto-Turret · Booshka Grenade Launcher · Buzzkill · Chain Gun · COG Machine Gun · Cryo Cannon · Dropshot Munitions Launcher · Laser-Guided Rocket Pod · Longspear Rocket Launcher · Mortar · Mulcher · One-Shot · Rocket Launcher · Salvo Rocket Launcher · Scorcher Flamethrower · Silverback Rocket Launcher · Stomper · Tripwire Crossbow · Tri-Shot Chain Gun · Twin-Barrel Turret · UIR Machine Gun · UIR Minigun · Ultra-Violet Turret · Vulcan Gatling Gun
Super-Heavy Weapons Asp SAM Turret · Ball Turrets · Brader · Defence Missile System · High Velocity Main Cannon · Flechette Guns · Fortress Artillery Cannon · Industrial Staple Gun · Kestrel Missile Launcher · Mega Mech Gatling Gun · Naval Gun · Pariah Cannon · Railgun · Torpedo · UIR Artillery Battery · UIR Anti-Air Turret
Weapons of Mass Destruction Hammer of Dawn · Imulsion Countermeasure Weapon · Lightmass Bomb · Lightmass Missile · Nuclear Missile · Venom Bomb
Equipment Adrenaline Injector · Barrier · Blow Torch · COG/UIR Ammo Crates · Cloak · COG Armor · COG Tag · Fire Extinguisher · Gas Mask · Gut-Puncher · Propane Tanks · Pulse · Remote Targeting System · Stim · UIR Armor · UIR Tag
Other Bow · Flash · Hijack · Shock Trap
Melee Weapons Butcher Cleaver · Breaker Mace · Combat Knife · Crystal Tooth Bayonet · Dual Chainsaw Staff · Explosive Flail · Serrated Knife · Staff · Tremor Hammer
Rifles Breechshot · Claw Light Machine Gun · Hammerburst Assault Rifle (Gorgon variant) · Hammerburst II
Shotguns Elite Sawed-Off Shotgun
Sidearms Boltok Pistol · Gorgon Submachine Gun
Grenades Bolo Grenade · Ink Grenade · Kryll Grenade
Heavy Weapons Boomshot Grenade Launcher · Canker · Digger Launcher · Multi-Turret · Nemacyst · Reaver Chain Gun · Torque Bow · Troika Heavy Machine Gun (RAAM's variant)
Super-Heavy Weapons Brumak Rocket Launcher · Wrist-Mounted Chain Gun · Brumak Rocket Mortar · Corpser Mine Layer · Hydra Missile Pod · Hydra Rocket Pod · Locust Defense Tower · Reaver Rocket Launcher · Siegebeast Catapult
Weapons of Mass Destruction Riftworm
Equipment Boom Shield · Imulsion Explosive Canister · Imulsion Injection Harness · Immune System Booster · Locust Ammo Crates · Locust Armor · Locust Emblem · Swarm Armor · Thumper · Torture Pod
Other Ticker
Easter Egg Weapons
Melee Weapons Elemental Cleavers · Fish Stick
Rifles A Real Gun
Shotguns Raging Buccaneer
Sidearms Despicable You · Memento Mori
Grenades Dom's Toms
Heavy Weapons Cluckshot · Trackshot
Other Relic Weapons