"C-Foam Grenade"
Tool type
Max charges

The C-Foam Grenade is a consumable that can be found throughout The Complex in resource containers. A single grenade contains enough C-Foam to reinforce a door without the use of another one, and can be used for slowing and immobilizing enemies as well.

Starting in Rundown 003, only singular C-Foam Grenades can be found, down from a maximum of three item stacks in previous Rundowns.


The C-Foam Grenades of GTFO can be utillized in two ways. They can either be used to reinforce doors or to slow down/freeze hordes of enemies heading towards the player.

  1. When thrown to a surface it will explode, dispersing a large amount of foam over the target area, slowing and immobilizing enemies who are hit by it or walk into it. After a certain amount of time the C-Foam will break however, putting the players on the clock.
  2. One grenade can fully reinforce a shutter door making it more ammo efficient, as opposed to using almost one full charge of the C-Foam Launcher which costs around 20% total ammo of your tool for the same effect. Throw the grenade at the center of the door to reinforce it.

Its drawback however is that its foam spread is a lot less controllable as of the C-Foam Launcher.

Example Scenarios/Strategies[]

Security Door Strategy[]

Security Door sequences are significantly easier if you attempt to reinforce every door possible. Because C-Foam Grenades are much more efficient than the C-Foam Launcher, it's recommended to use your grenades instead of the launcher to barricade the doors, barricading the doors is extremely useful because it significantly delays the monsters from destroying them, giving you ample time to finish the scans before they arrive.

Shotgun Sentry Gun[]

Throwing a C-Foam grenade in front of a Shotgun Sentry is very useful, as it can freeze the enemies and then give the Shotgun Sentry a chance to be able to use one of its shots on the enemy, usually killing them. This can be utilized to buy your sentry more time for larger waves, especially if it is placed behind a reinforced door.