It was my own fault.
You ever find yourself relearning things after you have stopped doing the action for a while. To put it into perspective, today I installed regnum online (again) and tried playing it. Two seconds into gameplay, it was lagging terribly. I could barely shut the game down!
The solution you ask? WELL… Just remember to turn OFF compositing before starting up any opengl games. XFCE will have to deal with it for now. lol