Like most online games, "WWIIOL" is a continual work in progress, and so has a history of updates that are frequently released to add new features, fix problems and improve existing features. Updates, or patches to the game code, were released every 6 weeks, on average; but recently have moved to a less frequent but larger content format of 3 or 4 times a year. These patches generally include a wide range of features and problem fixes. Everything from new weapons and vehicles to audits of the performances of existing weapons and vehicles are part of the patching process as well as terrain, structure, game play and performance improvements.