Play Alien Transform Battle Diamondhead online now. This 2D action platformer puts you in the middle of an alien invasion where transformation and timing decide victory.
Jump, attack, and transform to use powerful crystal abilities. Play solo or team up in local 2 player co-op to finish missions, beat bosses, and collect upgrades.
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Desktop
- Move: Arrow keys or A / D
- Jump: Spacebar
- Attack: J key or Left Ctrl
- Transform: K key
- Special: L key
- Pause/Menu: Esc
- 2 Player local: Player 2 uses I (jump), W/A/S/D or arrow cluster and H/J/K/L for actions if supported
Mobile
- Virtual joystick: Move left and right
- Jump button: Tap to jump
- Attack button: Tap to shoot or melee
- Transform button: Tap to switch to Diamondhead form
- Special button: Tap to use charged ability
- Pause button: Opens menu and sound controls
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Alien Transform Battle Diamondhead is a fast 2D action platformer where you defend Earth from an alien invasion. You control a young hero who can transform into the crystalline warrior Diamondhead. Each level mixes platforming, ranged and melee combat, and puzzle elements as you move through city streets, alien ships, and enemy strongholds. Your main objective is to clear waves of enemies, rescue civilians, collect power gems, and defeat area bosses to stop the invasion.
Gameplay centers on timing and transformation. Run and jump through side scrolling stages, use standard attacks and special moves, and switch into Diamondhead form to fire crystal projectiles, deploy shields, and smash obstacles. Levels include environmental hazards, hidden areas with upgrades, and miniboss encounters that require pattern recognition. The game supports single player and local 2 player co-op for shared screen action. Quick controls, short levels, and collectible upgrades keep each run engaging and replayable.
Game Details
Category
Adventure
Developer
Unknown
Technology
HTML5
Platform
Web Browser
Devices
Desktop, Tablet, Mobile
Game Features
Transform into Diamondhead
Switch forms mid battle to use crystal projectiles, shields, and heavy attacks to change combat strategy.
Fast 2D Platform Combat
Tight run and jump controls with quick attacks and combos for responsive, action packed gameplay.
Local 2 Player Co-op
Team up on the same device or keyboard to combine attacks and clear levels together.
Boss Fights and Minibosses
Face varied boss patterns that test timing, movement, and use of special abilities.
Power Ups and Collectibles
Find upgrades and gems to improve attacks, unlock new moves, and boost health between stages.
Frequently Asked Questions
Press the Transform button (K on desktop or the Transform icon on mobile) to change form. Transformation has a short cooldown so use it strategically.
Yes. The game supports local 2 player co-op. Use a second set of keys or a second controller on desktop, or share the touch controls on one device if supported.
Most browser versions track current level and collected upgrades during your session. For full progress save, use a supported account feature if the site offers one or avoid clearing browser data.
Learn boss attack patterns, keep moving to avoid area damage, use Diamondhead shield to block shots, and strike after a boss finishes a long animation.
Use the latest versions of Chrome, Firefox, Edge, or Safari. Enable JavaScript and allow WebGL for best performance.