The shrapnel will also go around corners to damage anyone who might be hiding there. The Shock rifle is also a familiar, but different fellow. It fires and energy beam that sort of explodes on impact. Secondary fire sends a glowing ball of death. UT's BioRifle is the new implementation of a Goo Gun, firing a blob of toxic slime that sticks to whatever it hits.
Alternate fire shoots a bigger blob.
Not much, unless somebody is chasing you and you lay down a goo trap. The snipe rifle also puts in a return appearance working pretty much as it did in Unreal. Zoom in with alt fire, squeeze off a round with primary fire. A head shot puts your target down with one bullet. The last weapon to put in an encore appearance is the Minigun.