Fifty-five invaders march across the sky, dropping lower every time they reach the side. Shoot them all before they land, keep out of the way of their bombs, and use the four shields while they last: everything chews through them. You start with 3 ships. If the invaders reach the ground the game is over no matter how many ships you have left.
Every wave you clear makes you stronger. The unlocks arrive at the start of the wave named below and are announced on the WAVE CLEARED banner. They are the same for everyone, so the world table compares like with like.
| WAVE | UNLOCK | WHAT IT DOES |
|---|---|---|
| 2 | Rapid fire | Two volleys in the air at once, quicker reload |
| 3 | Twin cannon | Two shots per volley |
| 4 | Piercing shot | A shot kills two invaders before it is spent |
| 5 | Fast cannon, +1 ship | Move 25% faster |
| 6 | Rapid fire II | Three volleys, faster reload |
| 7 | Triple cannon | Three shots per volley |
| 8 | Heavy shot | Kills three, and tunnels through shields |
| 9 | Rapid fire III | Four volleys, fastest reload |
| 10 | Fast cannon II, +1 ship | Move 50% faster |
| 15, 20… | +1 ship | Every fifth wave |
An extra ship also arrives every 10,000 points. You can hold six at most. The badges at the top left of the field show what you have.
| ← → or A D | Move |
| Space, ↑ or W | Fire (hold for auto-fire) |
| P / Esc | Pause |
| Q | Quit (while paused) |
| M | Sound on/off |
| I | This help |
| F | Fullscreen |
| ◀ ▶ | Move. Slide between them without lifting your thumb |
| FIRE | Hold it to keep firing |
| ⏸ (top right) | Pause |
Hold the phone upright: the field is tall. On iPhone, Share → Add to Home Screen gives you the full screen.
| Left stick / D-pad | Move |
| A / RB / RT | Fire |
| Start | Pause |
| ROW | INVADER | POINTS |
|---|---|---|
| Top | Squid | 30 |
| Middle | Crab | 20 |
| Bottom | Octopus | 10 |
| Sky | Mystery saucer | 50–300 |
A tribute to Taito's 1978 arcade game Space Invaders.