Sonic with the DOOM engine

Anyone know where I can find that Sonic The Hedgehog game done on the DOOM engine? I am not talking about one of those cheesey Theme packs from cdrom.com, I am talking about a game that looks and plays pretty much like Sonic Adventure for the Dreamcast.

http://www.srb2.org/

*cough*

Thankx a ton!!!!!!!!!!

Sonic Robo Blast 2 is the shit!