Disgaea: Netherworld Unbound is a game for Android devices. The game uses the sprites from Disgaea: Hour of Darkness.
In Disgaea For Android, you play as a Prinny who journeys into the Item World. You play through the Item World's randomly generated floors, fighting enemies and bosses. You can use the character creator to add characters to your army (made up of classes from Disgaea: Hour of Darkness).