http://pc.ign.com/articles/100/1002359p1.html

In case you've been living under a rock, MechWarrior was incredible. This is a game that wants you to time your shots and get the hell out. In a 70+ foot tall robot. Virtual On is a bread crumb in comparison to this giant banana loaf of soon to be free awesome. I got MechWarrior 4 (the version they're distributing) on release day. So fun.

Oh god this is awesome.
I played the demo and it was aawesomee even though my mech wouldn't stay still but constantly strafe left.