So the "Deep Sea Rescue" can be unlocked via level select/time challenge? It didn't unlock for me during campaign, and it also did not unlock for me when I did the less than 10mins achievement. I'll try again on time challenge and see if it will unlock - I don't want to start a new campaign if possible.
EDIT: Now I've played this mission 4 times, first during campaign and then 3 times via time challenge and it still hasn't unlocked! Any pointers on what's required for Deep Sea Rescue other than just completing the level?
EDIT 2: At the end of my 6th play of this mission, the achievement finally unlocked. This was via time challenge. At least I can now do this mission in 8:10 after 6 tries, LOL.
Last edited by 1mpr3gn4t0r; 01-13-2013 at 02:28 PM.