Rats, Bats, & Bones is a challenging trap defense game in which you play the role of a renowned engineer who must use wits and guile to defeat hordes of undead. Place traps including spikes, spears, cannons, bombs, and turrets, in the walls and floors. Be creative with barricades in order to shape the path of your enemies. Carefully select abilities as you battle your way through a story containing 45 hand-crafted levels. As you beat the invaders back, you will be rewarded with silver which can be used to unlock new traps, trap upgrades, and special player bonuses.