id Software has finally released the playable demo for Quake 4, allowing you to try out the recent sci-fi first-person shooter sequel by Raven Software. This demo includes a single-player mission from the start of the game "where you, as Matthew Kane, battle with Rhino Squad to clear a landing zone for the main earth forces", along with the multiplayer maps "The Fragging Yard" and "The Fragging Yard 1v1".
http://www.3dgamers.com/games/quake4/downloads/
ftp://ftp.idsoftware.com/idstuff/quake4/demo/Quake4_Demo.exe
http://www.computergames.ro/site/p/downloads/o/download-details/lng/en/dowid/5460/
http://files.filefront.com/Quake+4+demo/;4387358;;/fileinfo.html
http://www.gamershell.com/news/26505.html
http://files.vgpro.com/file/5156
http://www.3dgamers.com/games/quake4/downloads/
ftp://ftp.idsoftware.com/idstuff/quake4/demo/Quake4_Demo.exe
http://www.computergames.ro/site/p/downloads/o/download-details/lng/en/dowid/5460/
http://files.filefront.com/Quake+4+demo/;4387358;;/fileinfo.html
http://www.gamershell.com/news/26505.html
http://files.vgpro.com/file/5156