OSSARIUM

Your weapons fire on their own. Your only job is to not be where the horde is.

OSSARIUM is a bullet heaven in the Vampire Survivors mould. One arena, one run, fifteen minutes. The horde gets thicker every minute you survive, and at the end of it there is a boss waiting whether you are ready or not.

The run

Fifteen minutes, one ending. Elites show up from minute four and each one owes you a chest. Two mid bosses break the rhythm on the way. Then the Ossuary Demon arrives, and if your build went wide instead of deep you will watch your damage bounce off it.

Builds that go somewhere

Ten weapons, eight passive items, but you can only carry five and four. So every card you take costs you something else.

Max a weapon, max the item that pairs with it, and open a chest: the two fuse into something new. Five darts where there was one. A cleaver that hits for five times as much. Skulls that orbit you and never wind down. There are eight of these, and the pause screen keeps track of how close you are to each one so you are not guessing.

Four survivors

The Knight is free and takes a beating. The Elf, the Wizzard and the Lizard have to be earned, and each one starts you on a different weapon and a different problem to solve.

Between runs

Win or lose, the run pays out. Spend it on seven permanent upgrades, chip away at eight accolades, come back stronger.

Or switch on Nightmare, where the enemies get tougher, faster and meaner with every minute that passes, and see how far that gets you.

Controls

WASD or arrows to move, left stick if you are on a pad. Esc or Start to pause. That is it, there is nothing else to learn.

Plays in the browser. Windows build available if you want it offline.

Credits

Music
Nightwatch and Aggressive Drum Loop by North Fantasy Music, CC-BY 4.0
Boss Battle #2 (Symphonic Metal) by nene, CC0

Art
Dungeon Tileset II by 0x72, CC0

Sound effects are generated in code at runtime, there are no audio samples in the game.