Garry's Mod

OS: OS X version Snow Leopard 10.6.3
Processor: 2 GHz Processor or better
Memory: 4 GB RAM
Graphics: 1GB dedicated VRAM or better
Network: Broadband Internet connection
Storage: 5 GB available space
Additional Notes: Mouse, Keyboard, Monitor

Garry's Mod is a physics sandbox. There aren't any predefined aims or goals. We give you the tools and leave you to play.

Garry's Mod is a sandbox, moddable and multiplayer game developed by Facepunch Studios and published by Valve. It was released on November 29th 2006.
It's currently available in 25 different languages: English, French, Italian, German, Spanish - Spain, Bulgarian, Czech, Danish, Dutch, Finnish, Greek, Hungarian, Japanese, Korean, Norwegian, Polish, Portuguese - Portugal, Portuguese - Brazil, Russian, Simplified Chinese, Swedish, Thai, Traditional Chinese, Turkish and Ukrainian.

Garry's Mod has received 1,107,432 reviews of which 1,071,420 were positive and 36,012 were negative resulting in an impressive rating of 9.6 out of 10 😍

According to the Steam community, Garry's Mod has been assigned the following genres:

Sandbox Moddable Multiplayer Physics Building Casual Funny First-Person Singleplayer FPS Simulation Online Co-Op Co-op Shooter Comedy Action Indie PvP Realistic Exploration