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Strategy
UFO Defense
Shoot enemies and clear the boss to complete each of your missions Defend earth from the invaders
4.612k plays
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About UFO Defense
Shoot enemies and clear the boss to complete each of your missions Defend earth from the invaders. UFO Defense is a thinking player's game. Hit Play, survey the board, and set your plan before you commit. It leans fully into strategy, so if that's your thing, it delivers. Pick it up for a short break or settle in for a while — it runs well on phone, tablet, and desktop alike.
If you want to do well, keep this in mind: Trade units only when the exchange favors you; even a "win" can cost you the game if it's expensive. Scout. You cannot plan against what you cannot see.
You can play UFO Defense free online at Glaze Games — it loads in seconds, works on phone and desktop, and never asks you to sign up.
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How to play UFO Defense
UFO Defense is a thinking player's game. Hit Play, survey the board, and set your plan before you commit.
- 1Hit the Play button above and UFO Defense opens right inside the player on this page.
- 2The game loads in a moment — most titles are under 10 MB and start within about five seconds on a normal connection.
- 3Follow the in-game tutorial if it appears; most strategy games introduce the controls in the first level.
- 4Give the game window a click first so it registers your keys and taps, then dive in.
Frequently asked questions
Is UFO Defense free to play?
Yes. UFO Defense is 100% free to play on Glaze Games — no purchase, no signup, and no trial period. It runs directly in your browser and stays free as long as the original publisher keeps it available.
Do I need to download anything to play UFO Defense?
No download needed. UFO Defense plays instantly in any modern browser; there's no installer, no plugin, and no waiting beyond a quick load.
Can I play UFO Defense on my phone?
Yes, but UFO Defense is best played in landscape. Rotate your phone to landscape mode, or play on a tablet or laptop for the most comfortable experience.
Is UFO Defense safe to play at school?
UFO Defense loads from a reputable publisher and runs through Glaze Games' filtered catalog, so it's a safer alternative to random "unblocked games" sites. Whether it works depends on your school's network — if standard game domains are open, UFO Defense will load.
Where can I find more games like UFO Defense?
Once you've finished UFO Defense, scroll down to the "More games like this" section — we surface similar titles from the same category. You can also browse the full catalog by genre from the home page.
Player reviews for UFO Defense
Community verdict
6 reviewsPlayer reviews
Didn't think a browser strategy game could be this good — UFO Defense proved me wrong.snackz
UFO Defense runs great on my phone and my laptop. Love it.
UFO Defense is nice and smooth; a leaderboard would make it even better.
Came on for a quick go of UFO Defense and lost track of time completely.
Didn't think a browser strategy game could be this good — UFO Defense proved me wrong.
UFO Defense is my go-to when I've got a few minutes to kill. So good.
Great for quick breaks. UFO Defense could use more variety but I like it a lot.
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