"Attack bonus" refers to an advantage or extra strength given to a character or object when it is attacking or engaging in a battle. It helps increase the chances of hitting the target or inflicting more damage. Full definition
Within Kingdom Hearts Unchained X, Fantasia Mickey B medal were given out which allows players to increase the Special Attack Bonus of any medal by +1. (squareelite.com)
(Also called Special Attack Bonus in North America). (squareelite.com)
Eragon features multiplayer co-op with team attack bonuses and dragon fight / flight combo gameplay. (metacritic.com)