it's playable but the tiny graphics and low res make it not enjoyable. And there's slowdown.

Pretty much flawless at default settings.

This runs pretty good but looks bad. FSX looks better. I haven’t tried bums yet but this base game is playable.

Runs like a slideshow

Bad optimization

Bad optimization.

Bad graphics. Bad optimization.

Nope

800x600 looks great. Looks like a PS3 game. Nice graphics. 640x480 runs better but doesn't look as good. It's playable at 800x600 but not as smooth.

Low graphics runs pretty good. One of the best looking games I've tried. There's some slowdown but it just makes the entire game a bit slower than normal which makes it easier to dodge bullets.