Your Top 50 Games: 2012 Discussion Thread: FINISH YOUR LISTS

[Veknoid_Outcast]

Mr Khan said:
# 16: Ten years before the game that inspired the machinima series Red vs Blue, there was this game, which had a similar premise, and which, through the awesome power of fusion, could enhance other games.

I am seriously baffled by this one. I thought maybe it could be Sonic & Knuckles, but the years and premises don't match up.

It could be Wolfenstein 3D, but what is the "fusion"?