I was playing until 4ish last night, I already need to play through again, theirs so much going on. I am completely stuck on a repulsion gel puzzle.
ZX and I Gayed it up on CoOp last night...OOooOooo yeah...

The pink flag I equipped didn't help. Lots-o-fun.
So I tried find a pic but the game is still too new, did anyelse get a pink WCC flag for thier robots? If not I think I might know which achievement unlocked it.

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I found Zx's achievement:

Overclocker:
Complete Test Chamber 10 in 70 seconds