SI Plus

A mutation where you battle the other survivors getting to the saferoom first. With infinte ammo and regenerating health, the infected are merely there to slow you down. Items are replaced with adrenaline and molotovs. Features server...

The Green Flu mutates once again - causing the infected (and for some reason, their clothes) to shrink. They may not pack a full size punch but they still hit suprisingly hard and are even harder to hit. Like most pests, they're found in...

Build turrets. Guard the gnome. An arena style game mode where the objective is to build barricades and automated sentry turrets in order to keep the infected from smashing the gnome. Playable as Single player and Co-Op. Earn...

To launch from console map mapname shotguns_tankslayer_beta Kill Tanks or die trying! - mode: coop - maps: any - Tanks spawn more frequently and stronger with each kill, causing more damage - All Health is Temporary, Health is awar...

A modified survival mode where guns and items spawn randomly throughout the area at timed intervals. The guns have limited ammo forcing survivors to constantly search for new ones. Currently has custom item spawnpoints on: c1m4_atrium...

A simple template and example for a custom scripted weapon. A staff that shoots exploding fireballs. Note: this is not designed for gameplay, only as an example for mod authors. The script code is licensed with the MIT license. Have fu...

This mutation forces survivors to kill or die. Your health decays over time and the only way to keep it up is to kill zombies. The main aim for this mutation was to keep the core gameplay of L4D2 but mix it up by changing one of the m...

In this co-op mutation, you have to make your way through this horde of 'biters'. When you get bitten, you start bleeding out. Not only that, but zombies love the smell of blood. They get buffed when you're bitten, so clean your wound q...