The game uses a six-button layout: five of which are responsible for the attacks—punch, kick, slash, heavy slash and dust—and the other one for taunting or respecting the other player. There are several other techniques which are triggered when two or three buttons are pressed simultaneously.[10] A burst gauge is filled as time goes by or when the player receives damage; once the gauge is filled, the player can perform a Psych Burst to move away from the opponent. It unleashes a blast of energy that, if it successfully hits the adversary, completely charges another gauge, the tension gauge. The tension gauge allows the player to perform certain other special attacks.[11] The game features four main modes: Network Mode, Practice Mode, Battle Mode and Story Mode. The first allows online matches through the PlayStation Network (PSN) or Steam, depending on the platform, which may be ranked in world rankings. The Practice Mode features a regular training mode, a tutorial mode that teaches the basic controls, a mission mode that simulates battle situations, and a challenge mode that is focused on performing combos.[12] The Battle Mode comprises the arcade mode, which unveils part of the game's story after the player defeats eight opponents; a versus mode, in which the player can have offline battles with a second player or against a CPU; and a special "M.O.M" mode.[12] The M.O.M. Mode, which is an acronym for "Medal of Millionaires", is a variation of the regular survival mode in which the player earns medals based on performance and improves through a progression system.[13] The last mode of Guilty Gear Xrd is the Story Mode, which is new in the current installment. This mode presents the full game story as a film-like animation divided into several chapters, for uninterrupted viewing. The viewer can pause the movie at any time to investigate a glossary of game terms and plot devices, which are described in the library mode.