Manual v0.37 • Jan 2022
TL;DR: Dodge boulders and enemies, clear the levels, and survive as long as possible.
- Keyboard controls
- Stats: Score, Lives (ships)
- Inventory: Shields, Safe jumps, Extra gun energy, Missiles, Mines, Time bombs, EMPs
- Asteroids (boulders)
- Black hole
- Enemies: Flying saucer (UFO), Holy drones
- Power-up items: Gunfire energy, Shield bubble, Safe jump, Missile, Mine, Time bomb
- Bonus items: Gold, Cosmonaut
- Tips & Trix
Kuiper Belt is a cover version of the Atari classic arcade game Asteroids, offering additional features, e.g. shields, power-up items, alien drones, or black holes.
Built for modern browsers on PC.
There is no global win condition.
Just avoid losing ships, and keep shooting at asteroids (to split/destroy them) and enemies.
As soon as a level is free of boulders and enemies (and their bullets), the next level/wave starts.
When the player gets destroyed, the next ship will appear in the center (marked by a dotted circle) as soon as
Space is pressed.
When reaching the edge, most objects can wrap around: asteroids, player ship, bullets, UFOs, drones, homing missiles, mines, and time bombs.
Others will disappear: black holes, power-ups, and bonus items.
Objects of the same type won't collide, e.g. boulders, power-ups, bonus items, or drones.
Floating objects (power-ups and bonus items) are immune to bullets/missile hits, and won't collide with anything. They'll be destroyed, however, when hit by the explosion of a mine or time bomb.
↑ : Thrust
Accelerates up to max speed in the current direction.
Without thrust, the ship will slowly decelerate by itself.
→ : Rotate left / right
Rotates the ship's orientation (heading/shooting direction) counterclockwise or clockwise, by steps of 3°.
↓ : Instant turn
Turns the ship immediately by 180°, so it faces the opposite direction.
Pg Down : Hyperjump
The ship jumps (through hyperspace) to a random position, where it materializes with previous orientation and velocity.
Usually performed to quickly escape collisions or bullets, but a risky maneuver nonetheless - the target area might be unsafe as well (unless a Safe jump is available).
P : Pause (menu)
Pauses the game by showing the menu.
Space : Gunfire
The glowing blueish bullets have limited range, but they'll wrap around borders.
Default (no extra power) fire rate is 180 RPM (rounds per minute).
Adding extra power by collecting Gunfire energy enhances the gun's capabilities:
Operating the gun will slowly eat up (1 shot = 1 unit) any extra energy, especially when firing continuously.
- First, up to 1250 units, its fire rate increases (from 180 up to 450 RPM) gradually.
- Then, above 1250 units, salvo mode is switched on, where 3 bullets are fired at once in a spread pattern.
At every level/wave start, extra power is filled up by 250 units.
H : Homing missile
Launches a missile equipped with infrared sensor, attracted by the heat radiation of the nearest hostile vessel (UFO, drone/compound) engine.
Able to wrap around borders, it keeps flying until hitting an enemy, or accidentally colliding with an asteroid.
Only 3 missiles can be operative at a time.
At every level/wave start, 1 missile is added to the inventory (maximum: 10).
It can also be replenished by Missile power-ups.
M : Mine
Deposits (at rear side) a mine which is triggered only by colliding with an asteroid or a vessel (player ship, UFO, drone/compound).
Able to wrap around borders, it basically keeps drifting along until contact, where its explosion shockwave will hit all nearby objects within a limited radius.
Only 1 mine can be operative at a time.
At every level/wave start, 1 mine is added to the inventory (maximum: 10).
It can also be replenished by Mine power-ups.
T : Time bomb
Deposits (at rear side) a bomb which detonates after 3 seconds.
Able to wrap around borders, it drifts along until countdown ends. Its explosion shockwave will hit all nearby objects within a limited radius.
Only 1 bomb can be active at a time.
At every level/wave start, 1 bomb is added to the inventory (maximum: 10).
It can also be replenished by Time bomb power-ups.
E : EMP
Triggers an EMP (electromagnetic pulse) that immediately shuts down all enemy ship systems (engine, weapons).
Affected UFOs/drones then drift passively with their current momentum until reaching a border, by which the stun effect ends.
At every level/wave start, 1 EMP is added to the inventory (maximum: 10).
It can also be replenished by EMP power-ups.
Stats :: Score
Accumulates the points for hitting/damaging asteroids and enemies (flying saucers and drones), and for picking up bonus items.
Points are internally stored with decimal places; the value on screen is shown rounded down.
On reaching a 1000 point threshold, another life is added (up to 10).
Stats :: Lives (ships)
The player starts with 3 lives upon game start and earns an extra life (maximum: 10) per 1000 points.
Play continues to the last ship lost, which ends the game.
Inventory :: Shields
Temporary (duration: 3 seconds) force field, protecting from all incoming damage caused by collisions or hostile attacks.
Such a bubble is activated by pressing the
Each new ship adds up to 5 shields (maximum: 10).
Inventory can also be replenished by Shield bubble power-ups.
Inventory :: Safe jumps
Applies a free shield when a hyperjump is being performed, so the ship is instantly protected when materializing in the new location.
If the ship was already shielded when jumping, its bubble's endurance is prolonged by 3 seconds.
Each new ship adds 1 safe jump (maximum: 10).
Inventory can also be replenished by Safe jump power-ups.
All relatively large at level start, they split into smaller parts when being hit by bullets or explosions, until eventually they're destroyed.
Upon splitting, the resulting boulders can shoot off in unpredictable directions.
In the first handful of levels their initial number increases (4, 6, 8, 10) until there's 11 of them from level 5 onwards, much like in the original game.
Smaller boulders tend to have a higher velocity than bigger ones.
Also, the average speed of asteroids will slowly increase from level 6 to 20.
When a player bullet or missile hits an asteroid, score increases according to size: the smaller the boulder, the more points are rewarded:
~ 1 point
~ 2 points
~ 5.05 points
~ 8.35 points
~ 10 points
Occasionally, they contain a gold nugget.
These slowly drifting - and naturally pretty hard to spot - phenomena exert a gravitational pull on every object on the screen.
They come in three sizes: small, medium, and large, with the large being the most hazardous.
Unlike real black holes they won't destroy stuff directly, but they do suck everything towards them, which makes trajectory prediction harder, and increases the chance of colliding with something that will destroy.
The large black hole in particular is to be avoided, since it's strong enough to make the player ship stick for a while, which makes it a sitting target for all the other incoming debris.
There's one advantage against black holes, which is that the player's ship is fitted with inertial stabilisers, meaning that when it's still, it'll tend to stay still.
Enemies :: Flying saucer (UFO)
Every now and then, one of these alien ships turns up. They're able to wrap around borders, as well as shooting glowing reddish bullets.
Moves relatively slowly, and initially fires in pretty random directions.
Joins in after a score of 1000.
Clearly faster than the large one, and shooting more accurately.
As levels increase, so do their frequency, velocities, fire rate, accuracy, and bullet speed/range.
The number of UFOs on screen can raise to 2 in level 10, and to 3 in level 20.
Points are given only when they're hit by a player bullet or missile. Getting destroyed this way, flying saucers sometimes drop power-ups.
Enemies :: Holy drones
6-compoundThese peculiar autonomous vessels turn up as a compound of 4 or 6, drifting slowly and passively through space unless they are attacked, or collide with either an asteroid, a saucer, or the player's ship.
~ 7.22 points
PairWhen being hit, a compound splits into 4 single drones or 3 pairs (which also split when being attacked or collide), all of them starting to chase the player.
~ 14.44 points
As levels increase, so do their frequency and max velocities.
Pairs will at some point reach slightly higher max speed than the player, and single drones are always quicker than pairs.
The number of compounds on screen can raise to 2 in level 20, and to 3 in level 40.
Points are given only when they're hit by a player bullet or missile. Getting destroyed this way, drones sometimes drop power-ups.
Helpful items that can be collected by flying into them.
Power-ups are occasionally dropped by enemies (UFOs or drones) when they get destroyed.
Power-ups :: Shield bubble
Adds another shield, up to 10.
Power-ups :: Gunfire energy
Charges the ship's gun with additional 500 units of extra energy.
Power-ups :: Safe jump
Makes another safe hyperjump available, up to 10.
Power-ups :: Missile
Adds another homing missile, up to 10.
Power-ups :: Mine
Adds another mine, up to 10.
Power-ups :: Time bomb
Adds another time bomb, up to 10.
Power-ups :: EMP
Adds another EMP, up to 10.
Sporadically appearing objects that can be collected by flying into them.
Bonus :: Gold
Gold may be contained in asteroids, and gets released when small boulders are destroyed.
Fine goldPicking up a nugget yields 120 to 240 points, dependig on quality: the smaller, the better.
Bonus :: Cosmonaut
Picking up such a slowly drifting lost soul yields 100 points.
Tips & Trix
- Stay in the center for best overview. Avoid parking near edges.
- Use instant turns instead of slowly rotating 180° manually.
- Try to catch energy power-ups (especially when dropped by slow enemies).
- Get used to activate shields.
- Choosing targets:
- Flying saucers must be eliminated quickly, since they're the most dangerous objects.
- As of boulders, try to remove the fast ones first; they're hard to dodge otherwise.
One or two shots at approaching ones (to keep them from coming even closer) is enough.
Then fire at near small ones (better to hit than when they're far away).
- When aiming at fast moving objects, shoot ahead; also known as 'leading the target'.
- No need to shoot at drone compounds. Only the pairs and single drones are perilous.
- Don't forget to use hyperjumps once in a while, especially when shields are scarce.
- If you're after a high score, try to pick up tiny gold nuggets.