putting animations like run cycles and attacks in game?

how do I do this?

Make a walk cycle using the Action Editor and armatures, then go to the logic bricks under the armature and put Keyboard - Uparrow > AND > Action - Walkcycle. Hope this helps. You can do the same with attack Sequences.

thanks a lot :o

Oh yah, and make sure you set an idle action to be played when you are not pressing up arrow. (Idle action can just be first frame of run action :yes:)