BlackShift  
This game is really stunning! I got addicted immediately and could not stop playing it for hours! The only bad thing I noticed was the really different game speed on different computers: On some control is really tricky because the player moves so fast!

Overgod  
I have not seen any Allegro game with such cool graphics, such a number of game modes, extras and support for many platforms. It's excellent! (although I usually just come until level 2 or 3 :-)