Left 4 Dead 2 Achievements Full list of all 101 Left 4 Dead 2 achievements. It takes around 80-100 hours to unlock all of the achievements in the base game on Windows.The base game contains 52 achievements, and there are 7 DLC packs containing 49 achievements.Filter Achievement View View Image viewList view Sort by TrueSteamAchievement desc TrueSteamAchievement asc Achievement name desc Achievement name asc TSA Ratio desc TSA Ratio asc Gamers desc Gamers asc Steam order Date won desc Date won asc DLC Packs Group DLC packs together in list DLC Filter AllOwnedNone Flag Filter All None 5 Online Mode 96 Online/Offline 70 Single Player 10 Main Storyline 4 Difficulty Specific 1 Stackable 2 Collectable 17 Cumulative + 2 Viral 1 Partly Disc/Unob 73 Cooperative 91 Versus 1 External Content 16 Time/Date 1 x3 Players Required 1 x6 Players Required Link flagsOR joinAND join Achievements without these flags What are achievement flags? Click to find outApply Base Base Game (Excludes DLC) 1,284 52 4.3156,6531,405 (2%)80-100h GOOD GUY NICKPlays games with free weekend players and helps them survive a campaign. 1 guide