I think the colors are too much saturated.

 That is one awesome rat. Love the details on the weapons and the texture of the sand.

 Amazing Detail... 

thanks, I totally did not know that :)

well, the rat doesnt look light enough at all to me.. the dessert and sky provide huge contrast to that

 Thanks for the comments. ^^

@Frost Butt: The dithering, unless you mean the lines-seeping-into-neighbouring-color-patch-dither, is still kind of a way to aa, called dither-aa, which sometimes works well. :)

@4tochkin: Nah, just some nameless rat warrior.

@Leostereo: Yah, Serious Sam likes big guns too.

 Reminds me of serious sam. :D

Splinter? :) 

 That is amazing.

Nice one! I like how you've done the sky, fav'd

wow, I thought the sky was AA'ed!  But lo and behold it is dithering of all things :D

 The dithering in the sky is really unique! the only thing that I dislike about this piece is that the texture on the rat looks a bit sloppy where the light shines on it. Nice work!

 Amazing, i love the colours :)

Rat invasion! On the desert...

Anywhoo great pic! :D