Apeiron OMG :eek:
I remember playing that as a child, that game ROCKS 
I want to play it.... 
The OS X version is great.  It has 16-bit graphics, internet scores, and such.  Problem is, it's almost unplayable with a trackpad, and I have no USB mice around.  I'll have to buy a Bluetooth one for myself.  I got to try it with a real mouse at school, and I'm pretty good (I was a master at MS Centipede, after all), but the shareware version only goes to level 15 (which is a piece of cake to get to).  The only serial I can find online doesn't work though...fuck it, I'll just buy the thing.  The all-time high score is ~49,000,000 on level 6,824...I have some work to do. 

As for my precious Tetris, nothing beats the 1-bit/8-bit color Spectrum Holobyte version.  Period.