Originally Posted by h4mm32
Estimated achievement difficulty: 7/10
Offline: 50 
Online: 0 
Approximate time: 10-20 hours
Minimum number of play-throughs needed: 1 (1: 1999 will unlock all, but 1 more is recommended)
Man you must be really skilled if you can unlock the full 1000
within 10 or 20h. I'd rather say at least 25h+
even with a collectible guide since the game has a decent length!
No way you can complete this game that fast.