CSO: Zombies, Hold Out as Long as Possible!

Zombies flood every corridor in CSO: Zombies, Hold Out as Long as Possible!, and there is no safe base or mission screen to hide behind. Survival depends on how well you move through the post-apocalyptic maps and how efficiently you handle incoming waves of undead. There are no classic levels to clear, only continuous pressure and tougher enemies over time.

Weapon choice matters from the first second. The game offers 20 firearms with different damage, recoil, and fire rates, so a rifle, shotgun, or pistol works better in specific situations. Between attacks, tweak guns with sights for cleaner aim, silencers for controlled shooting, grips for steadier handling, and extended magazines for longer bursts before reloading. These modifications stack into a customized loadout that fits a personal playstyle.

How to play?

Hold off the zombie hordes as long as possible and keep moving through the maze-like maps to avoid getting boxed in. Earn cash by surviving and clearing enemies, then spend it on stronger weapons and power-ups that boost survivability, damage, or ammo sustain. Watch corners, choke points, and open spaces, since zombies can come from multiple directions at once. Stay focused, upgrade the arsenal whenever funds allow, and push for a higher survival time to beat a personal record and test new weapon builds in each run. Jump in, tune a favorite gun setup, and see how long zombie mode can be held off.