Morphological Anti-Aliasing:
http://sites.amd.com/us/game/technology/Pages/morphological-aa.aspx

MLAA works in Guilty Gear X2! The effect is similar to the filters you see used in emulators for older 8-bit and 16-bit games. MLAA is applied to the final frame, not to polygons, which I assume is why it can work on a 2D game like GGX2.

The game looks a lot better with it enabled... instead of looking pixelated, it looks like a cartoon, as all the "jaggies" are gone. I can't show you because FRAPs can't capture MLAA (it is added after FRAPs does the screen cap). AMD does have a utility to process screenies to show what MLAA looks like, but it doesn't seem to work (at least, the effect is very minor compared to the actual in-game effect).

Anyway, if you have an AMD card you should definitely try this out (you have to activate it via ATI Tray Tools etc). Hope some of you find this useful!

Found another program that emulates what MLAA looks like:

Screenshot Comparison

The difference is even more noticeable when the 640x480 image is blown up on my 1920x1200 monitor. The characters clearly look better, and the pipes etc. at the top of the screen look waaaaayyy better with MLAA on.

It's also more noticeable in motion. "Jaggies" sort of flicker and move in a distracting way, this eliminates most of that visual clutter.

All I can say: it works!

But you do need a fast GPU. I tried it on my AMD C50, and while it worked, the game was suddenly in slowmotion. On my desktop HD5800, it worked fine though.

@Gromuhl:
Cool, glad someone else got to use it!

Regarding Nvidia cards:
I'm not too familiar with newer Nvidia cards, but I believe they can force something called FXAA in games. It's basically their version of MLAA, but seems to be better in terms of performance and image quality. Some games actually incorporate it now (in which case AMD cards can use it, too). It *might* work the same way in GGX2R as MLAA does, but someone with an Nvidia card will have to confirm.

Just tried FXAA on my GTX670 and it worked brilliantly - Smoothed everything out with no artifacts that I could see - very nice and worth trying.

So YES, FXAA does work in GGX2R on Nvidia.

Awesome! You should definitely post this at the Dustloop forums. The folks over there would dig this quite a bit. ;)