Alienkillerrace writes "The open sourced, freeware FPS game Alien Arena 2009 has been released (Windows and Linux). The improvements to the game engine are very significant, and have surely raised the bar for free games of this genre. All surfaces in the game are now rendered using GLSL, not only improving the visual quality, but the performance as well. Interesting new effects like post-process distortions using GLSL have been implemented, as well as light volumes, better per-pixel lighting (reminiscent of UT3), and shaded water. Equally notable is that the sound system has been completely rewritten using OpenAL, allowing for effects such as Doppler, and adding Ogg Vorbis support. The game is free to play and available for download on its official website. It has a stats system and a built-in IRC client in its front-end game browser."