Triple Crown Achievement in Portal 2
Triple Crown
15Solve 3 co-op chambers in the Mass and Velocity course in under 60 seconds each
How to unlock Triple Crown
This can be gained in Course 2 – Mass and Velocity Test Chambers 1-8 and can be gained in either split-screen or over XBL.
You'll most likely have to do these again, after you've completed them once. Learn what to do, and where to be at the right time and you should have no trouble getting through some of the chambers in under 60 seconds.
You don't have to do all 3 chambers in a row, you just need to complete 3 under 60 seconds. So if you fail one, just return to the HUB and start again. The best ones to do this on are chambers 2, 3 & 4.
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