Our group of four unlocked Hero, but Completion glitched for all of us. One unlocked Completion the moment he entered the final fight, the rest of us unlocked it during it but without actually defeating the boss.
10k 29/03/09 - 100k 17/07/10 - 200k 02/09/11 - 300k 02/02/13 - 400k 20/11/13
Achievement #1000: Seek and Destroy - #10000: Fully Evolved - #20000: Data Security
Overachiever: 55 points - 16 Staff Clubs - C/F Clubs 10-5-2