HL1 Coop, -Singelplayer Modification - We wrote the year 2349, where only a few human beings live on earth. Since the great incidence, where a group of scientist have opened a portal to the fourth dimension, since then creatures threaten the earth and completely want to destroy our planet...
Confusing and hard to follow, but I found the level design attractive and the fighting, while hard and almost impossible in some places, was intense and fun.
Certainly not something to be overlooked C: