These games had humble beginnings, first as mere Half-Life mods, but have since grown into massive phenomena.

In Signal Station, you are the operator of a remote listening station who intercepts the first confirmed alien signal. Using ...

4 Loop, the co-op shooter from Left 4 Dead designer Mike Booth and JJ Abrams' studio Bad Robot Games, has a roguelike structure, along with lots of wacky, interlocking systems like alien plant life ...