The White Pass map was made available for Rush and the Nelson Bay map for Conquest. "Map Pack 6" was released on August 18. The Panama Canal map was made available for Squad Deathmatch and the Laguna Presa map for Squad Rush. "Map Pack 7" was released on December 1, and includes two maps ported from the first "Bad Company" game; "Oasis" and "Harvest Day", both of which are playable in all game modes. As well as these, two maps from the single-player campaign were ported to multiplayer; "Cold War" was made available for Rush, Squad Rush and Squad Deathmatch while "Heavy Metal" was made available for Conquest and Squad Deathmatch. Kit upgrades were released on April 21, 2010 for the Xbox 360, May 12 for the PlayStation 3 and December 1 for PC. Residents of the United States can retrieve unlock codes for the upgrades on the Xbox 360 by purchasing specially marked Dr Pepper bottles. The kit upgrades include two additional pins and one additional award for each class, as well as unique camouflage upgrades. Kit shortcuts were released on June 16 for consoles. The shortcuts are available for purchase for each separate class, or in a bundle pack for all four classes. Upon installation, the shortcuts will unlock all primary weapons, gadgets and specialisations for their respective class. A new mode, "Onslaught", was released on June 22 and 24 for the PlayStation 3 and Xbox 360 respectively. In Onslaught, up to four players co-operatively face endless waves of computer controlled enemies. "Bad Company 2" senior producer Patrick Bach said that DICE would "consistently support the fans playing "Bad Company 2" with new ways to get into multiplayer." He also said that the mode would "challenge the elite players with new experiences to improve their performance online." An expansion pack, "", was released in December 2010. "Battlefield: Bad Company 2" received mostly positive reviews from game critics. Aggregating review websites GameRankings and Metacritic have the PlayStation 3 version at 88.83% and 88/100 respectively, the Xbox 360 version at 89.03% and 88/100, and the PC version at 88.34% and 87. The iOS version received generally poorer reviews and holds scores of 73.33% and 64/100. GameZone's Steven Hopper gave the game 9.25/10, saying, "Even though the single-player campaign still isn't where it needs to be, "Bad Company 2" is definitely a great sequel that builds on its predecessor in every way, making for one that no shooter fan will want to miss, especially if you go online for your gaming."