Check out Steam's first Free Weekend Weekend which will feature 10 games that you play for free starting Thursday, 16 October at 10am PT through Sunday, 19 October at 1pm PT: Free Weekend Weekend

The following games will be discounted for purchase as well as playable for free: Payday 2, Company of Heroes 2, Awesomenauts, Trine 2, Blade Symphony, XCOM: Enemy Unknown, Don't Starve, Grid 2, Killing Floor, Injustice: Gods Among Us.


Free games will be available to play until Sunday, October 19th at 1pm Pacific, but games will be discounted through Monday, 20 October at 10am Pacific.

• Cooperative gameplay for up to six players against multiple waves of specimens
  
• Persistent Perks system, allowing players to convert their in-game achievements into permanent improvements to their character's skills and abilities
  
• Over 170 Steam Achievements, including “Dignity for the dead” for killing 10 enemies feeding on dead teammates' corpses and “Hot Cross Fun” for finishing off 25 burning enemies with a Crossbow
  
• Slow-motion “ZEDtime” to better watch those crucial and violent creature deaths, even in multiplayer
  
• Solo game mode for offline play
  
• Ten different monster types trying to eat your face off, armed with everything from teeth and claws, to chainsaws, chain-guns and rocket-launchers
  
• 33+ weapons for the players to chose from, ranging from knives and fire-axes to pump shotguns, rifles and a flamethrower
  
• Equip your team with welders, medical tools and body armor to help your odds of survival
  
• Choose which Perks to play with to best balance out your co-op team against the horrors
  
• Open, non-linear play areas: choose when and where to fight — or run; weld doors closed to direct the monster horde down alternate corridors
  
• Fully-configurable, allowing players to change the difficulty level, number of creature waves, or even set up their own favorite waves of monsters
  
• Support for Steam Friends and other Steamworks features
  
• Includes Windows-only SDK for the creation of new levels and mods
  

• OS: Ubuntu 12.04 LTS. fully updated
• Processor: 1.2 GHZ or EquivalentMemory: 1 GB RAM
• Memory: 1 GB RAM
• Graphics: Nvidia. ATI. or Intel GPU with hardware-accelerated drivers Hard Drive: 2 GB free hard drive space

• OS: Ubuntu 12.04 LTS. fully updated
• Processor: 2.4 GHZ or EquivalentMemory: 2 GB RAM
• Memory: 2 GB RAM
• Graphics: Nvidia. ATI. or Intel GPU with hardware-accelerated drivers Hard Drive: 2 GB free hard drive space