Disgaea 3 is a tactical RPG; most of the game involves battles on isometric maps upon which the player controls a group of characters. Maps often feature "geo blocks" with statistical effects on the battlefield, that, unlike in previous games, can be stacked or stood upon. Many objects in the environment, including these blocks, and characters themselves, can be lifted, thrown, or destroyed. Certain classes can create boxes or barrels to create stepping stones. Characters can form stacks, allowing them to reach higher areas or perform "tower attacks". When throwing a character to a monster-type ally, they will bounce an extra distance based on the second thrower's direction.
With the newly introduced "magichange" feature, monsters are able to transform into specific weapons in which a partner can use to execute a strong technical attack. To do this they must be assigned to the same club as the ally, and the change is temporary. After two turns the monster disappears from battle.