Army of Darkness Defense is a castle-defense game based on (and named after) the third movie in the cult-classic comic-horror series "Evil Dead." You play the chainsaw-armed hero Ash Williams, and audio samples of his highly quotable dialogue play a starring role in the app.
Unlike so many movie tie-in games, Army of Darkness Defense manages to be quite good: it's a mix of resource management and arcade action, in which you re-enact the frantic defense of the movie's finale. Waves of enemies--skeletal and/or demonic "Deadites"--advance from right to left inside the scrolling castle interior. You move left and right (by tapping either side of the screen) and fight them yourself, with a shotgun autoattack and upgradeable special abilities. You also fight them with allies you call to your side, from peasants and swordsmen to heroes like Lord Arthur, Duke Henry the Red, and the healing Wiseman.
The gameplay revolves around choosing which units to build and when, earning gold by surviving each level's onslaught, and then using that gold to upgrade your abilities, castle, and units in between levels--but you don't have enough gold to upgrade very many of your special abilities and units, so you have to prioritize. You can also collect some gold (and iron bars, to speed up unit production) from fallen enemies while you're fighting--and that makes for some fun, fast decision-making, as you weigh whether to risk the melee for a quick boost to your resources.
Fans of both castle defense games and the movies (especially Ash, aka the goofy, over-the-top Bruce Campbell) will find a lot to like here. The game's only weaknesses are a lack of variety--you defend the same castle for 50 levels, followed by an infinite mode--and the potential to paint yourself into a corner strategically, requiring you to buy more coins as an in-app purchase. Overall, though, Army of Darkness Defense does a good job of balancing its core gameplay and its in-app economy, and many players will likely buy in-app currency just for access to more and more entertaining powers (like Ash's Deadite-reaving 1973 Oldsmobile Delta 88, the "Deathcoaster").