Death Inc. is a real-time strategy/puzzle game for mobile and PC, where you play Grim T. Livingstone, freelance reaper. The kingdom of Britain and its evil king threaten the world, and it's up to you raise an army of zombies, invade their cities and bring them down. Originally on Kickstarter, the game failed to meet its funding goal but the devs have moved on to a paid alpha model (like Minecraft, Prison Architect.) For $10 you get access to the alpha and beta builds, and a pre-order for full release.
http://www.ambientstudios.co.uk/deathinc/ - Homepage and ordering info.
http://www.rockpapershotgun.com/2013/04/12/death-inc-brings-us-a-paid-alpha-thing/ - RPS article on the paid alpha offering.
http://www.rockpapershotgun.com/tag/death-inc/ - List of RPS articles on the game, which includes several gameplay videos.
In Death Inc, you use the mouse or your finger to drag death around the screen. As you collect minions, you use Death to create what are basically "scent" trails for them to follow, which is your primary way of directing their movement and activity.
There's several different types of Undead that match up with their living counter parts in a sort of rock/paper/scissors fashion. You swarm your zombies at the living residents of the city, and when they kill someone, they get added to your horde. Many of the game's challenges take the form of puzzles. So there might be some swordmen blocking your route, and they are covered by archers standing on a nearby hill. To ignore the archers would be the doom of your horde, so you have to take out the archers first. Other examples include pushing a cannon around with your horde so it can blast through barricades, using your horde to operate switches and levers, and on. You can supplement your horde with unnatural powers, like summoning a swarm of crows to distract and harry your enemies, plagues and the like.
There's also a management portion to the game, where I guess you build a headquarters for yourself and outfit it with stuff and furnishings. There's also a MP component to it which I haven't taken the time to look at.