Dungeon Descent is an incremental dungeon crawler where you fight enemies, acquire loot, and descend into increasingly more difficult floors of the dungeon.
Lethal Tournament is a deckbuilding roguelike set in a dystopian megastructure. Build a deck, reshape it with Items, and bend the rules with Charms as you fight your way up the Tournament to find out what it's actually for.
One laser. Build a machine of mirrors, splitters and lenses that burns every step of the path. Light gets tired: every enemy it passes through drains it, so where you split and where you strike is the whole game. A tower defense where you engineer the damage. When it slips mid-wave, grab a mirror.