What is Xeno Defense Protocol?
Xeno Defense Protocol is a free shooting game with rpg, bullethell and multiplayer elements that you can play online in your web browser on Gameziko. It needs no download, no install and no account. Xeno Online combines high-octane top-down shooting with strategic tower defense and deep RPG progression.
How to play Xeno Defense Protocol
- Press "Play now" on the game screen. Xeno Defense Protocol loads inside the player; some games take up to 20 seconds and may show a short ad first.
- WASD, Mouse, R, G, Mouse Wheel, Space
- Use the full-screen button at the bottom right of the player for a bigger view, and press Esc to leave full screen.
Game details
| Category | Shooting |
|---|---|
| Tags | rpg, bullethell, multiplayer |
| Controls | Mouse, WASD keys, Space bar |
| Screen | Landscape (1600 × 900) |
| Price | Free |
| Download or sign-up | Not needed |
| Distributed by | GameDistribution |
| Added to Gameziko | 30 September 2026 |
Description from the developer
Xeno Online combines high-octane top-down shooting with strategic tower defense and deep RPG progression. Your mission is simple: Establish a base, defend it against endless waves of insectoid horrors, and extract with your life.
Xeno Defense Protocol: frequently asked questions
Is Xeno Defense Protocol free to play?
Yes. Xeno Defense Protocol is free to play on Gameziko, with no download and no account needed. Like most free web games, it is funded by ads, so it may show a short ad before or between rounds.
What are the controls in Xeno Defense Protocol?
The developer's instructions for Xeno Defense Protocol say: "WASD, Mouse, R, G, Mouse Wheel, Space"
Can I play Xeno Defense Protocol on a phone or tablet?
Xeno Defense Protocol is an HTML5 game, so it opens in modern mobile browsers as well as on a computer. Its controls were designed mainly for a mouse, so a computer usually gives the smoothest experience.
What games are similar to Xeno Defense Protocol?
If you like Xeno Defense Protocol, try Zombie City Master, Murderers VS Sheriffs Duels and The Horde. They are shooting games with similar themes, and you can find more in the Shooting category on Gameziko.
Good to know
Xeno Defense Protocol is made by an independent developer and delivered by GameDistribution, so Gameziko cannot change the game or recover lost progress. Any progress the game saves is kept in your browser on this device. If the game does not start, wait up to 20 seconds, allow ads for gameziko.com and try again, or report the game.