SI Plus

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...

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...

This mutation is like Tank Rush with a twist: There are only boomers at first, but boomer vomit will attract a mob of tanks. The goal: finish without getting vomited (and if you do get vomited, finish without dying). It may sound simple,...

Zombie Run is a gamemode similar to deathrun, made to work using L4D2's mechanics. The survivors have to run through the course and wait for the rescue helicopter, while being chased by zombies. The Special Infected ARE the traps. They h...

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...

Giant infected + Boomers. Infected are slower, but have a lot of health and hit hard. Aim for center mass down, head shots won't count on standing infected atm due to model bbox issues. I'd simply recompile them but don't want to mess...

Infected have new abilities. Designed for competitive versus gameplay. Play with friends or start a local public lobby to play online. Both Infected and Survivor: * HP Notifier: Type !tankhp to find out how much health tanks have * ...

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...