Battle Points

Battle Points (BP) are the currency earned in Metal Gear Rising: Revengeance, used for purchasing upgrades and equipment in the games customisation menu.

History
It appears the Battle Point system was an invention of Doktor, who was authorised to give Raiden upgrades and equipment in exchange for his activities. The system appears to ultimately be based on that previously used by Drebin 893 to reward Solid Snake during Liquid Ocelot's Insurrection.

Mechanics
Battle Points are gained for general combat performance, locating pickups, and for scoring highly in ranked battles. BP thus gained can be spent on upgrades and new equipment in the Customisation store.

Ranked battles are judged by the following criteria:


 * Time
 * BP
 * Zandatsu
 * Longest Combo
 * Kills

The goals for each rank vary according to the battle; each criteria is worth up to +1000 BP. Fixed bonuses are awarded in addition for taking no damage and completing the battle with no kills. The sum total determines the ranking for that battle.

The full stage ranking is the sum total of ranked battles, with additional points awarded for BP, Zandatsu and kills outside of ranked battles. Time outside of ranked battles does not appear to be counted.

It is possible to get a no-damage BP bonus for every stage except R-00, where it is currently thought to be impossible to avoid damage from Jetstream Sam after Raiden loses his arm. It is extremely hard to get the bonus on R-03 due to the sequence at the end, and most no-damage runs use a convoluted trick involving pushing a large number of fire extinguishers to the final area before triggering the battle and slashing them to hide Raiden's position.