You are alone in a wrecked city and everything in it is walking towards you. The weapons fire themselves. What you decide is where to stand and what to pick up when the level comes.
WASD or the arrow keys walk you and space dashes you through whatever has closed in. On a phone, drag anywhere to move and tap with a second finger to dash.
Every weapon takes the nearest target inside its own range and fires on the tick something walks into it. The mouse aims if you want it to, and nothing in the game requires it.
Each level stops the clock and puts four cards in front of you. Max a weapon and the passive it is paired with and the weapon turns into something else.
A run ends when your health does, and the salvage you picked up goes into the Armory. Those upgrades are permanent, so the next run starts further along than this one did.
The crowd
Swarmers arrive as a cloud, Lungers commit to a charge they telegraph first, Spitters hold their distance and strafe, Bloaters sprint in and light a fuse, Bulwarks repair everything standing near them. Seven elite modifiers roll on top and stack up as the run goes on.
The bosses
The first arrives five and a half minutes in and another every five minutes after that. The Colossus calls in brutes, the Hive Queen never stops spawning, the Devourer drags you towards it.
Surveeve runs in a browser tab, free, and there is nothing in it to buy.
No account, no advertising, nothing for sale, and no network request once the page has loaded. Your Armory, your records and your settings sit in the browser you played in and go no further. There is no last level to reach: every thirty minutes the city starts again harder, and you stop when you feel like stopping.