Approximate amount of time to 375G: 7-8 Hours
ONSLAUGHT MODE 125G
playing only ranked games it took me 1:56:00 minutes to get all the achievements.
SURVIVORS MODE 125G
It took me about 2:36:00 minutes to unlock all the achievements.
PREDATOR MODE 125G
It took me 1:48:00 minutes to get all the achievements.
if you boost it should be faster.
C O M P L E T I O N I S T
1000G Dead Space 2
#1 on MEXICO #16 Worldwide
#1 Worldwide 1500G skate 3
100% Retail 43/46 - 100% Arcade 12/12
Working on: HALO WARS 99.00% COMPLETED