Gameplay in Battlefield: Bad Company 2 resembles that of the original and is set in various environments from around the world, including the mountainous regions along the borders of Russia. Like its predecessor, Bad Company 2 features destructible environments. The system is dubbed "Destruction 2.0," and the level of destruction is extended — players can now completely collapse a building as opposed to only blowing out walls. Along with Battlefield Vietnam, Bad Company 2 is one of only two games in the Battlefield series to have blood without third-party modification. There will be new vehicles in Bad Company 2, such as the UH-60, a quad bike, a two-man patrol boat, a personal watercraft, an AA-gun mounted on a light tank, and a UAV helicopter controlled via computer. Single-player The single player campaign has 11 missions, and features the same characters from the first game. The game's prologue, as revealed through an ESRB rating explanation, takes place on an "unnamed Japanese island in the Pacific" during World War II.[12] The prologue introduces the player to a secret weapon with incredible power, which drives the campaign, and has Bad Company move along the west coast of North and South America. The campaign will feature jungles in South America to snow-capped mountains in Alaska.