Grey Havok's Crystal War

Grey Havok's Crystal War is a chaotic arcade FPS where you defend powerful crystals from waves of monsters, mutants, flying enemies, and oversized nightmare fuel. Fight solo, team up locally, or jump into
Steam online multiplayer as you blast through arenas, survive escalating waves, and try to keep the crystal and yourself alive.
Choose your character, customize your guns, grab power-ups, and push through multiple game modes built for fast action and endless replays.
Features
-Wave Defense
Unlock levels and protect the crystal surviving all the waves.
-Inferno
There is no end.  You will not survive. 
- Local Multiplayer
Play couch co-op or local 1P vs 2P modes with split-screen support.
- Steam Online Multiplayer
Create or join online lobbies and fight through networked matches with friends.
- 1P vs 2P Battles
Face off in player-versus-player modes while customizable enemies and hazards keep the pressure on.
-High Scores
Each mode tracks high scores.
- Power-Ups
Turn the fight around with pickups like health, ammo, grenades, freeze time, and other boosts.
- Character Customization
Pick different characters and head styles to personalize your player before jumping in.
- Cheat Codes
Unlock goofy and powerful modifiers, including DK Mode, party lights, rainbow guns, god mode, and more.
- Enemy Variety
Many strange and demented enemies with different abilities to fight.
- Arcade FPS Chaos
Fast movement, loud weapons, monster swarms, glowing crystals, portals, explosions, and plenty of “what just happened?” moments.
Defend the crystal, survive the waves, and bring a friend if you want someone else to blame.