Milord, We Have a Zombie Problem

Medieval tower defense against a horde of tens of thousands of zombies. Build crossbows, ballistae, trebuchets, dragonfire braziers, storm spires, alchemist towers and sunlance prisms beside the road, aim them by hand and hold the keep while zombies, skeletons, hellhounds, necromancers and dragon-liches pour in. Four heroes stand guard at the gate: Sir Knight with his sword, the Elf Ranger with a fan of arrows, the Sorceress with arcane blasts and Death the Reaper with his scythe. Between battles, spend the souls of the slain in the War Council: a huge upgrade tree with new towers, spells, griffin riders, a holy meteor and a training tree for every hero.

Goal: keep the dead from reaching your keep until the whole horde is gone. Before each battle, pick a tower in the bottom bar (or press 1-7) and click on the walls or raised ground beside the road to build it, or drag it from the bar onto the map. Then click or drag to set its aim; towers sweep around that point. Drag your hero to any spot on the road. Press Space (or tap Start Battle) to begin. During the battle, click the horde to hurl a Royal Fireball (hold to keep casting) and use your other spells with keys 1-4. Right mouse button drag or the arrow keys pan the map, the wheel zooms, Space pauses. After the battle, spend Souls, Royal Seals and Holy Relics in the War Council to unlock and upgrade towers, spells and heroes. On phones: tap to build, drag to aim, pinch to zoom.