The Campaign mode in Call of Duty: Modern Warfare II gives players a lot more incentives to explore, offering a less linear experience than ever before. One new feature is the implementation of hidden safes, giving players useful rewards, along with an Achievement/Trophy for opening three of them. Opening the safes is tricky, though, as you’ll need to find their locations and know each code to get in. Thankfully, we’ve got all the details for finding and opening each safe in Modern Warfare II.
