Hammer Crush is an ability exclusive to Hyperdimension Neptunia. It allows the player to clear obstacles in the way inside a dungeon.
Some dungeons contain an obstacle that prevents the player from going down a desired path. An obstacle could be rock formations, stacked boxes, or a metal gate. To remove the obstacle, a character with the ability gets in front of the obstacle and "crushes" the obstacle in the way. This ability has a recharge time that must be replenished in order to use it again.