About this game

Gravity Drop is a vertical descent game built around a single uncomfortable fact: you are only safe while you are falling. The capsule accelerates downward until air resistance balances gravity, and a hazard line above you climbs at its own steady pace. Every platform you land on buys the hazard line time to catch up.

The platforms are not decorative. Each one is a real collider with its own restitution and friction, so a rubber bar flings you back upward, an ice bar slides you sideways with almost no grip, and a solid bar simply stops you dead. Finding the gap matters more than reacting quickly.

How to play

  1. Press Start, wait out the three-second countdown, and the capsule begins to fall.
  2. Steer with the left and right arrow keys, or drag to either side of the capsule on a touchscreen.
  3. Look ahead for the gap in the next platform and line the capsule up before you reach it.
  4. Avoid landing on anything. Contact costs you depth, and the hazard line above never stops climbing.
  5. If you get pushed above the hazard line, the run ends. Your best depth is stored on this device.

Physics mechanics

Here is what the simulation is actually doing while you play.

Gravity and terminal velocity

The capsule accelerates downward at a constant rate, but it also carries a linear drag term. Drag grows with speed, so after a second or so the two balance out and the fall settles at a steady terminal velocity. That is why the descent feels fast but controllable rather than accelerating forever.

Restitution

Restitution is the fraction of approach speed a surface returns. The pink rubber bars sit near 0.78, so most of your downward speed comes back as upward speed — usually straight into the hazard line. The dark solid bars are near 0.05 and absorb almost everything.

Friction and sideways control

Your steering is a horizontal force, not a teleport. Once you are moving sideways you keep moving until drag or a surface slows you, so the trick is starting your turn early rather than correcting late.

Objective

Fall as far as possible. Depth is the score, and the run ends the moment the hazard line reaches you.

Scoring

  • Depth is worth one point per ten world units — the metre markers on the shaft wall show your progress.
  • Passing through a gap awards 10 points, or 25 if you thread it close to one edge.
  • There is no time bonus. Falling further is the only way to score more.

Scores, favourites and play history are stored in your own browser using localStorage. There is no account, no leaderboard and no server: clearing your browser data clears them, and they do not follow you to another device.

Tips

  1. Start the turn early. Sideways momentum takes about a third of a second to build. Commit to a gap while it is still two platforms away.
  2. Treat pink bars as walls. A rubber bar returns most of your speed upward. Landing on one is usually fatal, not a setback.
  3. Use ice deliberately. Ice bars barely slow you sideways. If you overshoot a gap, a glancing ice contact can slide you back on line.
  4. Do not chase edge bonuses early. The extra 15 points for an edge pass is not worth the risk until you are deep enough that depth points have stopped being the main source of score.
  5. Watch the vignette. The red glow at the top of the screen grows as the hazard line closes. When it fills the top third you have roughly two seconds.

Difficulty

Medium. The controls are simple and the first 100 metres are forgiving, but the gaps narrow steadily with depth and the hazard line speeds up. Most players reach 150 metres within a few attempts; getting past 400 takes genuinely reading the platform materials rather than reacting to them.

Features

  • Endless descent with no level cap
  • Three platform materials with different bounce and grip
  • Rising hazard line that never stops climbing
  • Depth-based scoring with a bonus for threading gap edges
  • Local best-depth record

How accurate is this?

Physics Arcade games use simplified, tuned physics built for playability. They are not scientific simulations: forces, masses and timings are chosen because they feel good at 60 frames per second, not because they match measured values. Where a game departs from real-world behaviour in a way that matters, the game page says so.

Gravity Drop – FAQ

Why does landing on a platform end my run?

It does not end it directly. Landing stops you falling, and the hazard line above is always climbing. A landing costs you depth, and enough lost depth lets the hazard line reach you.

What is the fastest the capsule can fall?

The capsule has a terminal velocity set by its drag coefficient. It reaches roughly that speed within a second of a clean fall and cannot exceed it, which is why deep runs are about line choice rather than acceleration.

Do the platform colours mean anything?

Yes. Dark blue-grey bars are solid and absorb impact, pink bars are high-restitution rubber that bounce you back up, and pale blue bars are low-friction ice.

Is my best depth saved?

Yes, in this browser only, using localStorage. There is no account and no global leaderboard.