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''BioShock Infinite: Burial at Sea'' is an episodic expansion to the first-person shooter video game ''BioShock Infinite'', and a prequel to the original ''BioShock''. It was developed by Irrational Games, and published by 2K Games. It is available on Linux, Microsoft Windows, PlayStation 3, Xbox 360, and OS X. ''Burial at Sea'' consists of two episodes. ''Episode 1'' was released worldwide via download-only on November 12, 2013, and ''Episode 2'' was released on March 25, 2014. A retail version for PlayStation 3 and Xbox 360 was released on November 4, 2014 as part of ''BioShock Infinite: The Complete Edition''. ''Burial at Sea'' is set after the events of ''BioShock Infinite'', which spanned several alternate realities and was themed on the nature of choice. Whereas ''Infinite'' took place aboard Columbia, the floating air city set in 1912, ''Burial at Sea'' takes place in an alternate reality within the underwater city of Rapture, a year before the events of the first ''BioShock'' game (which is set in 1960). The game features Booker DeWitt as a private detective, and Elizabeth as a ''femme fatale'' who employs Booker's services. ==Gameplay== Like ''BioShock Infinite'', ''Burial at Sea'' is a first-person shooter with role-playing elements. Using a mixture of the limited spaces of Rapture in ''BioShock'' and ''BioShock 2'' with the expanded environment of Columbia from ''BioShock Infinite'' allows for more dynamic combat challenges. Returning from ''BioShock'' and ''BioShock 2'', the player may carry more than two weapons at a time, and can collect other weapons and ammunition either from defeated enemies or from random locations around the city. Returning from ''Infinite'' is the regenerating shield, while health can be replenished with medical kits or food. Plasmids and Eve replace Vigors and Salts from ''Infinite''. Plasmids grant activated powers such as creating shockwaves, releasing bolts of electricity, and machine/human possession. Plasmids require Eve, the equivalent of magic points for powering their abilities. The player can traverse Rapture both on foot and by riding a pneumo-line, a roller coaster-like rail system similar to the Skyline from Columbia. The player rides the pneumo-lines via a wrist-mounted tool called an Air-Grabber, which the player and enemies use to jump to/from and hang onto the self-powered tracks. Players can jump onto, off of, and between pneumo-line tracks at any time, and may face enemies that use the system to attack; the player can use one-handed weapons in Booker's free hand while using the pneumo-line. Freedom of movement along the pneumo-line allows for several varieties of combat, including flanking, cover, and area-of-effect attacks through creative uses of the system. Throughout episode one, the player does not directly control Elizabeth, but instead she scavenges the area for supplies such as ammunition, medical kits, Eve, and other items, and tosses them to Booker as needed. She can also use her Tear-opening powers to aid the player, bringing in weapons, health, Eve, assistance in the form of Samurai warriors, and automated defense units. Only one Tear can be opened at a time, forcing the player to decide between the available options to suit the battle. ''Episode Two'' includes a "1998 Mode" in which the player is challenged to complete the episode using only stealth and non-lethal methods of defeating enemies. The mode is a callback to ''Thief: The Dark Project'' released in 1998 by Looking Glass Studios, the predecessor to Irrational Games, and is compared to the main game's "1999 Mode", itself named in reference to the release year of Irrational's ''System Shock 2''. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「BioShock Infinite: Burial at Sea」の詳細全文を読む スポンサード リンク
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