Works pretty much like a machine gun, with standard fire, and a faster, less accurate, alternate fire. Unreal Tournament wouldn't be much of an update without some totally new weapons, and the two new ones that Epic managed to bring to the game are going to be some of your favorites. The Redeemer fires of a small tactical nuke that will pretty much devastate anyone in the blast radius. Secondary fire lets you guide the missile to its destination. The second new weapon is my personal favorite, the Pulse Blaster.
Primary fire is rounds of energy bolts shot out like a machine gun.
Secondary fire sends out a stream of energy that you can pretty much use like a scythe, mowing down targets by swinging left and right. Graphically, UT hasn't progressed much beyond the original Unreal. That isn't to say the graphics don't look great, they do. The graphics look best on a 3dfx based video card, as they are still 16bit textures. UT plays just fine on the Rage 128 cards included with all new Macs, but on 3dfx the game just looks sharper.