Original Unreal Tournament demo
Full user review
"Easy and Good"
If you like FPS you have to like Unreal Tournament.
MP,SP or host your own MP server and ability to add bot AI. Weapons are well thought out. Option for software rendering, 3d support or openglide support to play.
Most gamers have migrated to newer games so the game while having its glory days is showing its age. Don't expect to see hundreds to thousands of online players still actively playing on a regular basis.
One of the best FPS to ever come out, Runs descent on almost any pc from Pentium 4 or socket A chipset with a simple graphic card. I own the Full Version and still played the demo because its that entertaining and easy to get working.