Just one, Super Monkey Ball. I regretted the purchase, as I found the single-player frustratingly hard and the multi-player quite random. I've stayed away from Sega ever since.
Edit:
Oops, I almost forgot my DreamCast! I had bought a Dreamcast in 2001 when it was on sale because I figured I could play lots of great games for little money, but that didn't work out. I still have Ready2Rumble and Crazy Taxi somewhere.
Hardcore gaming is a bubble economy blown up by Microsoft's $7 $6 billion losses.







