Don't think, FEEL~~~~
Disable fire blocking so your units can fire through each other.
Adds a lot of new units, buildings and airstrikes. And a few modified units too.
Makes all enemies twice as tough. Halo mythic skull for bioshock.
With this you can customize the monster health values and plenty others. And make items respawn in coop. For Quake 1, Scourge of Armagon and Dissolution...
Makes single player levels playable in Coop. And also makes all multiplayer characters playable in coop, with fixed health and armor. The other coop model...