Age of Invasion  
I enjoyed this game at lot, it was very unique and original. I didn't have any problems with the speed, but I found it annoying that there was no option to make the game windowed instead of full screen.

XOP  
This game has all the things one expects and loves about shooters. The first level is fast, hard, and action packed. Both the music and graphics are very nice too. This is one game I will keep an eye on.