Counter-Strike: Condition Zero meets Quake III Arena and Half-Life. CT vs T team deathmatch on Condition Zero maps, fought with Quake III's entire arsenal, while Half-Life's monsters crash the match.
- All nine Quake III weapons: Gauntlet, Machinegun, Shotgun, Grenade Launcher, Rocket Launcher (rocket jumps included), Lightning Gun, Railgun, Plasma Gun and BFG10K, with their own models, sounds and explosions.
- Arena pickups, no buy menu: 39 pickups per map on de_dust2_cz and cs_office_cz: weapons, ammo, health, armor, the six Quake III power-ups (Quad Damage, Haste, Regeneration, Battle Suit, Invisibility, Flight), and the Teleporter and Medkit.
- Half-Life monsters (new in 0.3): press H to spawn any of ten Half-Life monsters: Headcrab, Zombie, Houndeye, Bullsquid, Vortigaunt, Alien Grunt, Human Grunt, Gargantua, Alien Controller and the black-ops Assassin. They attack everyone, and CT and T bots fight them. (Don't question me lol)
- Team deathmatch, Quake style: you respawn after 2 seconds with the Gauntlet and Machinegun. The first team to 40 frags wins, and the Quake III announcer calls the lead.
- Bots and friends: CZ bots fill both teams with Quake III guns. Friends can join your game through Steam's relay (up to 16 players).
Controls:
| Key | Action |
|---|---|
| 1–9 | Quake III weapons |
| Mouse 3 | Next weapon you have |
| Mouse wheel | Your CZ pistol and knife |
| F | Use your holdable |
| H | Monster menu (0 closes it) |
Needs: Condition Zero, Quake III Arena and Half-Life. Nothing from any of them is included: everything is read from your own copies when you press Play.