UPDATE:This game has been released FREE. Get it here
Developed by Invasion Interactive Ltd., Rising Eagle: Futuristic Infantry Warfare is a multiplayer, team based, tactical first person shooter set in the near future, circa 2040AD, in a world where the USA faces new contenders for superpower status. Players participate in the conflicts of tomorrow in urban and open field infantry combat.
The demo does not require a CD-Key.
However, if for some reason the demo asks for one, just enter 1111-1111-1111-1111
UPDATE:there is a new demo version 1.1 - FileFront Mirror