Alien Invasion
Relive the golden age of arcade gaming with this retro fixed-shooter. Defend Earth as waves of pixel-art aliens march across the screen and descend toward you. Three alien types — squids, crabs, and octopuses — each worth different points. Shoot through destructible barriers for cover, chase the mystery UFO for bonus points, and survive increasingly fast waves. Features authentic retro CRT scanline effects, neon glow projectiles, procedural sound effects, and touch controls for mobile. How many waves can you survive?
How to Play
How to Play:
- Move your ship left and right to dodge alien fire
- Shoot upward to destroy the alien formation
- Use barriers for cover — they degrade when hit
- Shoot the mystery UFO for bonus points (50–300)
- Clear all aliens to advance to the next wave
Controls:
- Arrow Keys / A,D: Move ship (Desktop)
- Space: Shoot (Desktop)
- Touch Buttons: Left, Right, Fire (Mobile)
Scoring:
- Squid (top row): 30 points
- Crab (middle rows): 20 points
- Octopus (bottom rows): 10 points
- Mystery UFO: 50–300 points (random)
Tips:
- Aliens speed up as fewer remain — pick off columns, not rows
- Save your barriers for later waves when aliens shoot faster
- The UFO appears periodically — listen for the warble sound
- Don't stay in one spot — keep moving to avoid alien fire
Frequently Asked Questions
How do you play Alien Invasion?
Move your ship left and right with arrow keys or touch buttons, and press Space or the Fire button to shoot. Destroy all aliens in the formation to advance to the next wave. Avoid alien projectiles and use the four destructible barriers for cover. The mystery UFO flies across the top periodically for bonus points.
How does the wave system work?
Each wave starts with a full formation of aliens. As you destroy aliens, the remaining ones move faster. When all aliens are destroyed, a new wave begins with increased base speed and more aggressive firing. The game continues until you lose all 3 lives.
What are the different alien types?
Three types of pixel-art aliens: Squids (top row, 30 points), Crabs (middle rows, 20 points), and Octopuses (bottom rows, 10 points). Each has two animation frames. The mystery UFO appears at random intervals and is worth 50 to 300 random bonus points.
Is Alien Invasion free to play?
Yes! Alien Invasion is completely free to play online with no downloads. Features retro pixel art, CRT scanline effects, neon glow visuals, procedural sound effects, high score tracking, and responsive touch controls for mobile play.
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