You have a spear. They have a tank. Hold your totem through forty stages of escalating history, from hungry wolves to riot police, carving the arena apart as you go. Die, and you start again at the beginning, but the gear you took off a boss stays yours.
Machines vs. Monsters is a roguelite tower defense. Land on a hostile planet, build mazes of industrial firepower, and hold your Command Center against escalating native waves. Lose, learn, upgrade the fleet, redeploy. Batavia's survey says the site is viable. The site disagrees.