Crystal Siege
PlayHold the road. Save the Heart Crystal from the UFO fleet.
- Kind
- Browser game
- Status
- prototype
- Engine
- three
- Platforms
- desktop, mobile
- Inputs
- mouse, keyboard, touch, gamepad
A UFO fleet wants your Heart Crystal. Build towers along the road and stop them before they reach it.
How to play
- Pick a green tile next to the road and build a tower.
- Press Start wave when you are ready. The arrows on the road show where the UFOs go.
- Earn gold for each UFO you shoot down. Spend it on more towers and upgrades.
- At level 3, each tower picks one of two branches. The choice is final.
- Win a map to unlock the next one. Keep all 20 lives for 3 stars.
Towers
| Tower | Job | Note |
|---|---|---|
| Ballista | Pierce | Bolts fly through a line of UFOs. |
| Cannon | Splash | Shells burst and hit a crowd. |
| Frost Crystal | Slow | Pulses slow every UFO nearby. |
| Catapult | Long range | Heavy rocks. Cannot hit high flyers. |
Enemies
| UFO | Type |
|---|---|
| Scout | Fast, low health. |
| Hauler | Slow, lots of health. |
| Skimmer | Flies high, straight to the crystal. |
| Splitter | Breaks into three small UFOs. |
| Mothership | The boss at the end of each map. |
Controls
| Action | Mouse and keyboard | Gamepad | Touch |
|---|---|---|---|
| Select a tile | Click, or arrows and Enter | Stick and A | Tap |
| Build | 1 to 4 | A in the menu | Tap in the menu |
| Upgrade / sell | U / S | X / Y | Tower panel |
| Next wave | Space | Select | Button |
| Speed | F | RT | Button |
| Pause | P or Esc | Start | Button |
On a phone, play in landscape.
Credits
3D models: Tower Defense Kit by Kenney (kenney.nl), CC0. Flags, effects, icons, sound and music are made in code for this game.