Zombie Cafe

Zombie Cafe (ゾンビカフェ) is a free to play game from Beeline Interactive (a subsidiary from Capcom) released in 2011 for the Apple iOS. It can be downloaded for free at the app store, but charges real money for additional in-app content.

Summary
It's hard to find good help, thus a café owner partnered with an evil corporation to use zombies as free labor to build a café empire. Customers can be infected to become eternal zombie slaves by using a toxin, giving the chef an advantage over the neighboring "human" cafés. Like a normal café, players prepare food with all kinds of recipes, direct the (zombie) workers, decorate the place, manage supplies, and earn money to improve the café. However, if the zombies work too hard they'll get tired and try to eat customers. If the competition gets too fierce, the chef can always direct the zombies to attack a neighboring café and steal their secret recipes and money.

Mega Man Collaboration
In 2014, from December 26 to December 31, an event was held in the Japanese version of the game where Mega Man content was available during its duration, players being able to acquire Mega Man characters and recipes.

Some Mega Man characters later returned briefly alongside other Capcom characters as rare gacha prizes in August 2015, September 2015 and January 2016.

Characters:
 * Dr. Light (Dr. Right) (2 versions)
 * Mega Man (Rockman) (2 versions)
 * Roll (2 versions)
 * Proto Man (Blues) (2 versions)
 * Dr. Wily
 * Air Man
 * Cut Man
 * Sniper Joe
 * Met (enemy only, can't be acquired)

Recipes:
 * Ayashii E Can Soup (あやしいE缶スープ, roughly "Mysterious E Can Soup")
 * 1UP-fū Steak (1UP風ステーキ, "1UP-style Steak")

Others:
 * Wily Castle (cameo as map café)
 * Rush (café decoration - outdoor)
 * Octopus Battery (café decoration - chair)
 * Destructible Blocks (café decoration - table)
 * Goblin (café decoration - table)