Cleared all 56 nonsecret challenge rooms in BC:Rearmed. I'm not even going to try the secret ones.
The only thing i have left to do in that game is the final area on Super Hard, but I suck at the final boss and haven't even managed to hit the thing in about 60 tries at the boss.
Edit: 20 more fucking lives lost at him. Yet another Albatross run to do later. I only hit the thing on 7 of those, and only one time on each just to mess up the rockets 3 times, get walled 3 times, and get lasered once.