Fixed path tower defence, the way the Flash era did it, with the piece most of them leave out: a garrison that puts knights in the road, so the column stands still while everything else you built shoots it. Four tower families, three levels each, then a permanent fork into one of two specialisations. Plus two spells on cooldown, tin knights that laugh at arrows, bats that fly straight over your blockade, and a goblin on a bike who is faster than any of this was designed for. Twelve waves. The Warlord is the twelfth and he insisted on a health bar.