I should check those out! I really miss those days. Playing the Vampire slayer mod. The Specialists, Sven co-op, Brain bread, even the silly minigames in counter strike 1.6.
I miss these times so much. I know there is minigames in csgo, but its mostly just the jail and zombie escape ones.
In counterstrike source there were zombie survival maps where you had unlimited ammo and could shoot props such as couches infront of doorways to kind of block yourself in. I would hide in the vents and shoot a couch into it. Then go in it myself and they would only be able to attack from the front because the couch would block my back.