Normal Controls excluding ENTER, use Z. Gaster uses all colour souls. The Determination Extractor does something later in the game. Gaster returns, Alphys tells him about you Genocider. Gaster's attacks come in a random order.
Original Game made by Toby Fox All sounds from Undertale Music: Title: Gaster's Theme Artist: Toby Fox Sprite: http://piq.codeus.net/picture/343447/w_d_gaster_battle_sprite
