When I start Team Fortress 2 (game) on Steam (gaming platform) with Linux Mint 16 Petra (XCFE edition) it is very glitchy in the menu by showing parts of the loading screen. And when I go to a server it is even worse: alot of effects don't show propertly or don't show at all, there are anomalies containing random letters, numbers and colors everywhere and randomly cuting of parts of the HUD and the floors are flashing white color. Any help with this? My laptop is MS-1722 (that is not the actual marketing name) and it is very old, but it dual-boots Windows 7 and Mint well, and Team Fortress 2 runs well on Windows 7. As the title says I think the problem is in XCFE as the developers of the game say that they recommend and will give support only to users of Ubuntu 12.04 LTC Unity, so I got Unity from packet menager but I don't know how to start it.