5-10 min
Asteroid Drift

Asteroid Drift

Reaction

A ship that turns and pushes but never steers, in a field of rocks that wraps at every edge. Break one and you get two faster ones.

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Home / Reaction / Asteroid Drift

Asteroid Drift is a free online asteroid shooting game built on one uncomfortable idea: your ship has no brakes and no steering. It rotates, and it thrusts, and everything after that is momentum. Point where you want to go and push, and you keep going that way until you turn all the way round and push back — which is why most rocks that hit you are ones you drifted into rather than ones that arrived. The field wraps at all four edges, so nothing is ever off-screen for long and there is no corner to hide in. Every rock you break splits into two of the next size down, and the small ones are the fast ones, so a wave gets busier right before it empties. Eight waves, from a thin outer belt up to The Grinder. No download, no account.

How to play Asteroid Drift

  1. Left and right arrows rotate your ship. They do not move it — they only change which way it is pointing.
  2. Up arrow fires the engine, pushing you in whatever direction the nose currently faces.
  3. Space bar shoots. Four shots can be in the air at once, so you cannot simply hold it down.
  4. On a phone, the four pads under the field do the same four things, and they can be held together.
  5. There are no brakes. To stop drifting, turn until the nose points back along the way you came, then thrust.
  6. The field wraps: fly off the left edge and you come back in on the right, and rocks do the same.
  7. Shooting a large rock turns it into two medium ones, and each of those into two small ones. Small rocks are the fastest.
  8. A wave is clear only when every fragment is gone — so a wave of two large rocks means fourteen kills, not two.
  9. You start with three ships and get two seconds of blinking invulnerability after each one is lost.
  10. Clear a wave without losing a ship for three stars; one loss is two stars.

Tips

  • Tap thrust, do not hold it. Short pushes let you place the ship; a long push commits you to a direction you then have to spend time undoing.
  • Learn to fly backwards. Thrust away from the field, then rotate to face it while still drifting — you get a clear shot at rocks that are receding rather than closing.
  • Shoot large rocks from as far away as you can. Up close, the two fragments it becomes are already inside your collision radius.
  • Break rocks near the edges of the field, not in the middle. Fragments then spend their first seconds on the far side rather than around you.
  • Small rocks are worth the most points and are the ones that kill you. Clear them before they cross the field again.
  • Never chase. Every rock comes back to you eventually because the field wraps, so wait and let it fly into your line of fire.
  • Use the wrap on purpose. A shot that leaves the right edge keeps travelling and arrives from the left — you can hit something you are flying away from.
  • If you are boxed in, thrust first and aim second. Spending half a second lining up a shot while cornered is how a run ends.
  • Lead the rock, not your own drift. A shot leaves at full speed in the direction the nose is pointing and does not carry your momentum with it, so where to aim depends only on how fast the rock is crossing your line — the same lead works whether you are drifting or stopped.

FAQ

Is Asteroid Drift free to play?

Yes. It runs in the browser with no download, no sign-up and nothing to buy. All eight waves are included and unlock as you clear them.

Why can I not stop?

Because that is the game. The ship has a rotation and an engine, and nothing else — there is no brake and no sideways drift. Momentum decays very slowly, so stopping means rotating a hundred and eighty degrees and thrusting against your own movement. It is the skill the whole game is built on, and it is why the game is called Drift.

How is this different from Galaxy Blaster?

Galaxy Blaster is a free-flying shooter: you drag your ship where you want it and it goes there. Asteroid Drift takes that direct control away. You point and push, and the field wraps at every edge instead of scrolling, so the two play almost nothing alike despite both being about shooting things in space.

Why does the field get busier when I shoot?

Every rock you break becomes two of the next size down, and the smaller sizes move faster. A wave of two large rocks is fourteen rocks in total, and the middle of a wave is the most crowded it will ever be. Clearing steadily from one area beats scattering shots across the field.

Is every wave actually clearable?

Yes, and it is checked rather than assumed. Two numbers make it true: no rock at any size can move faster than a bullet, and the ship cannot fly faster than its own fire. If either were false a fragment could be chased forever, or you could catch up with your own shots. Both are asserted in the test suite, and every wave is also flown to completion there by a reference pilot.

Do I score more for small rocks?

Yes — small rocks are worth 100 points, medium 50 and large 20. The fast, hard-to-hit fragments are the ones that pay, so a careful clear scores far better than shooting only the big slow rocks.

Is Asteroid Drift the same as Asteroids?

No, and it is not affiliated with it. Asteroids is Atari’s arcade game, and rotate-and-thrust in a wrapping rock field is the genre it created — this is an original game in that style, with its own eight named waves, its own physics constants and its own scoring. No Atari code, art or audio is used.

Does it work on a phone?

Yes. Four pads sit under the field — turn left, turn right, thrust and fire — and they can be held at the same time, which is what the game needs. In portrait the field takes the taller frame and the pads grow for thumbs.