Tower Siege is a free Arcade game you can play instantly in your browser, with no download and no registration. How to play: Everything is playable with one hand on a phone or with a mouse on desktop. It renders at 800 by 600 pixels and scales to your window. It joined SaGo Games on October 29, 2026. It is an HTML5 build, so it loads in any modern desktop or mobile browser.
Build a tower out of the blocks you are dealt, then defend it. Between waves you get a hand of four shapes — walls, archers, cannons, mortars, tesla coils — and a short window to place them. Then the horde arrives: goblins, boar-beasts, burning hounds, bone knights and siege engines that out-range everything you own. Blocks that lose their support fall, and falling rubble crushes whatever is underneath. Spend wood, stone and gold, unlock the tech tree, and see how deep you can get.