A new Left 4 Dead sequel doesn't appear to be anywhere in sight, and in the absence of a new entry from Valve there are plenty of other contenders to the co-op FPS survival throne. Call of Duty Zombies. Back 4 Blood. Killing Floor 2. GTFO. And now Hellbreach: Vegas, a new Steam game from solo developer Infinity Ape Studios, set to launch in early access very soon, and with a free playtest coming even sooner.
