Halo

Play Halo and compete in this multiplayer-based first person shooter against fearsome opponents straight from your Mac OS X Dashboard.
Made proudly with the free Unity3D engine.
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WASD to move.
 Space to jump.
 Q to shift weapons.  
E(hold) pick up weapons
 Left Mouse Button to shoot.  
Right Mouse Button To zoom.  
C/scroll wheel to melee.  
Caps Lock to throw grenade.  
Tab to switch grenade type.  
Control to Crouch.
 ESC opens the menu.
 P displays scoreboard.  
Mouse to look around.