A free 3D tower-defense game in the browser tab: rotate a hex-tiled planet, place towers on its land cells, and stop waves of ground and air enemies before they reach your cities. Play a campaign of hand-built levels or an endless mode. WebGL, no install, no account, nothing uploaded.
Prefer defending a flat map instead of a globe? Try the 2D Medieval Wall Defense.
A 3D WebGL planet tower-defense on the open-source Earth Defense engine. About 0.65 MB downloads once from this site when you press Play, then the browser caches it.
Best on a desktop with a mouse and keyboard: drag to rotate the globe, scroll to zoom, click a land cell to build, keys 1 - 9 pick a tower.
Globe Siege
freetoolonline.com editorial team
Globe Siege is a 3D tower-defense game played on a planet. The world is a sphere tiled into hex and pentagon cells; enemies land in fixed corridors and march overland toward your cities, and you defend by placing towers on the land cells along their path. Drag to spin the globe, zoom in to read the terrain, and build before the first wave lands. Press Play to start.
Controls at a glance:
| Action | Input |
|---|---|
| Rotate the planet | Drag |
| Zoom the view | Scroll wheel |
| Pick a tower | Keys 1 - 9 |
| Build on a cell | Click a land cell |
| Cancel build | Right-click |
| Pause / speed / mute | Space / F / M |
You spend energy to build from a roster that grows as the campaign advances - ground guns, anti-air, and support towers, each upgradeable for fire rate, damage, range, or income. Enemies arrive on the ground (crawlers, heavies, splitters, siege behemoths, screamers) and in the air (flying swarms, dive craft, gunships), led by a boss mothership that drops landing pods. Mountains take only anti-air and radar while oceans give an energy bonus, so where you build matters as much as what you build.
Play the two-chapter campaign of hand-built levels, each with its own corridors and written objective, or an endless mode where you pick a difficulty and swarm scale and survive escalating waves. Your progress, saved loadouts, and best endless run are kept in your browser - no account, nothing uploaded. The game is about 0.65 MB (one Three.js bundle, all procedural, no asset files), downloads once, and needs a WebGL browser; it plays best on a desktop because picking towers uses the number keys. It runs on Earth Defense, an open-source game by developer TaoweNlin under the MIT license, translated here from Chinese to English.
Frequently Asked Questions
What is Globe Siege?
It is a 3D tower-defense game that runs entirely in the browser tab. You defend a hex-tiled planet by placing towers on its land cells to stop waves of ground and air enemies from reaching your cities, across a two-chapter campaign or an endless mode. It runs on the open-source Earth Defense engine.
Does it work on a phone?
You can drag to rotate the globe on a touch screen, but picking towers uses the number keys 1 - 9, so it plays best on a desktop or laptop with a keyboard and a WebGL-capable browser.
Is my progress saved?
Yes. Your campaign progress, saved loadouts, endless best-wave count, and mute setting are stored in your browser's local storage on this device. There is no account and nothing is uploaded; clearing your browser data resets them.
What towers and enemies are in the game?
New towers become available as the campaign advances and include ground guns (Pulse Cannon, Gatling), anti-air (Orbital Laser, Flak Missile), and support (Radar Station, Focus Prism, Energy Reactor). Enemies arrive on the ground (crawlers, runners, heavies, splitters, siege behemoths, screamers) and in the air (flying swarms, dive craft, gunships), led by a boss mothership.
Is it free and open-source?
Yes. Globe Siege is free to play with no account. It runs on Earth Defense by developer TaoweNlin, released under the MIT license; this build translates the original Chinese interface to English and ships the license file next to the game.