This game is a Early access zombie game made by Monochrome LLC who are also known for making the HL2 Free-To-Play mod Zombie Panic Source. Like Zombie Panic Source, this game is a HL2 mod. There are only two modes so far; Player vs Player and Extraction.
Player vs Player is my personal favorite and most liked to the community that I talked to in-game. Player vs Player or PvP starts out with 6 survivors spawning at random locations with a one random melee weapon and one random pistol with one clip in it. Then survivors have to look threw houses for weapons and ammo.