Modern Unlocks 2 for iPhone is an unofficial reference guide. Call of Duty: Modern Warfare 2 is the game everyone's playing. The multiplayer mode contains hundreds of unlocks and a compelling level-up/ranking system that is sure to keep you addicted a long, long time. MW2 for iPhone is the unofficial companion app for the game Call of Duty: Modern Warfare 2 by Infinity Ward. MW2 Pwn serves as a handy reference guide to the game's unlocks, including Achievements, Multiplayer Challenges, Titles, Emblems, and now Maps.