You know what's great for the Tetris effect? The first couple of days after buying an FPS.

Not only is it 3-dimensional, but it feels like you're walking around in your head. The best, and worst, part about it is that since you worry there might be a sniper or semblance thereof you just keep on walking. Never gets tiring, actually...

I'll see if a little TF2 could give me a little HI.