I enjoy Clear Sky. I enjoy it because it isn't a generic shooter, the STALKER series isn't generic its amazing. Clear Sky is and can be very buggy but nothing some mods wouldn't fix!.
This is an odd game in the series. It has a heavier focus on combat over anomolies. My main complaint was the mess that is the Faction Wars, lopsided sides mean either a battle up or downhill depending on your faction, assuming you can even finish without squads getting stuck or endless assaults. It is a solid game, but it gives way to linear final areas with little warning leaving your character possibly VERY under prepared.
Developer: GSC Game World
Publisher: GSC World Publishing
Release Date: 15 Sep, 2008
Genre: Open World, Survival, Action, RPG, Shooter, Adventure, Sci-fi, Horror