Enter the Gravirinth [Beta]
Learn more


About Gravirinth

According to legend, a forgotten civilization once mastered the power of gravity, which they used to travel across the Milky Way, in search for alien life. Eager at first to share their wisdom, soon they became aware that most alien life forms were not ready to receive this great power...

So an enigma was devised to test the intelligence of alien societies, a puzzle marvelous yet so obscure that finding it would be a challenge in the first place. Thus the Gravirinth were born, each hidden into the most promising solar systems.

In the next millenia, few Gravirinth were ever found, and even fewer yielded their secrets, a rare moment of great joy where two civilisations found they were not alone in the vast cosmos. In the Solar System too had once a Gravirinth been found, but its location was lost to mankind...

...until Xeno, the Exoarchaeologist, arrived. Will the Gravirinth reveal its mysteries?


  • A deep labyrinth of spatial puzzles;
  • an exoarchaeology space expedition at the outskirts of the solar system;
  • a carefully hand-crafted, minimalist and mysterious atmosphere;
  • special features:
    • for experienced puzzlers: harder bonus levels;
    • for perfectionists: a smart action counter;
    • for explorers: some very well-hidden or almost unreachable paths;

Release notes


A modern browser is all Gravirinth needs to run - so Windows, Mac, Linux, Android and iOS devices are all covered.

An internet connection is not required to play Gravirinth, except when entering the Hall of Fame.


Gravirinth is scheduled to release by late February 2019. Meanwhile, all pre-orders earn a 25% discount, in appreciation of early enthusiasm!

Reserve your seat now in the expedition to the Gravirinth!

Book now!

Development log

Follow development @ Gravirinth's log, or...

Test play


Load a the latest version of Gravirinth using your secret password or contact Pedro PSI to request one. Many thanks!

Load game [beta]

Press & reviews

Would you like....

  • to write an article about Gravirinth?
  • to feature Gravirinth in a curated collection?
  • to record a playthrough video or livestream?

Then apply for a free media pass!

Apply for a media pass!

There's also a press kit.

Other inquiries

Please contact Pedro PSI for all unusual requests!

Screenshots & Logo

Download all screenshots + logo ↓↓↓ (zip archive)

How to play

Read the instructions below beforehand or skip them in favour of Gravirinth's interactive tutorial!

Gravirinth tutorial 1:move and switch gravity

Navigate the Gravirinth with the arrow keys. Step on gravity beacons to change your specific gravity! The controls change accordingly.

Pick any number of blocks with the downward arrow key. Place them strategically with the upward arrow key to overcome obstacles!

Gravirinth tutorial 2:pick and carry blocks
Gravirinth tutorial 3:throw a block

Blocks also have their own specific gravity! Push blocks in your way or throw them horizontally to a higher platform!

What if two specific gravities collide? An unstable gravity field materialises, keeping everything in place. Untangle the collision, and it eventually vanishes!

Gravirinth tutorial 4:collision of specific gravities
Gravirinth tutorial 5:incoming call

Base communicates with you though a low-bandwidth intercom. In this way general tips and orientation hints may be given.

Finding the elusive fourfold orbs requires persistence and inventiveness. Try your best!

Gravirinth tutorial 6:fourfold orb

Additional Controls

Gravirinth tutorial 7: undo

Your progress is reported continuously to base, so you may retrace your steps whenever you've done anything wrong. Press Z on your exopad.

A special record of your progress is created whenever you reach a save point. Press R on your exopad to go back in time! This should work even if you quit the game for a while.

Gravirinth tutorial 8:save
Gravirinth tutorial 9:rescue

At the end of the expedition, Press X on your exopad to call rescue, unless you prefer to collect any still accessible fourfold orbs...

Controls - touchscreen

Tap to simulate pressing X and swipe to simulate an arrow keypress.

Open the tab on the left beside the game to: undo, restart and return to menu.

Real-time feedback

Press F anytime to provide real-time feedback! Much appreciated!

Level navigation

The lateral buttons beside the game screen (which appear and disappear as needed) let you navigate to a previous checkpoint, or return to the most recent one. Please be aware that saving after going to a past checkpoint will erase your most recent checkpoint saves.

Hall of fame

Once you beat Gravirinth, you'll be invited to enter the Hall of Fame! As soon as you pass the final credits screen after winning, you'll be able to type your name in a new window. Make sure you are connected to the internet, then press Submit to be remembered forever or close the window to forsake your glory.



Enjoyed Gravirinth? Add your message below to the Creative Archive's guestbook!

Leave your message!


Comment and discuss Gravirinth on the dedicated discord channel!


Gravirinth by Pedro PSI, 2019.

Game Engine

Made with Puzzlescript.

The source will be available some time after the release.


All Gravirinth's background music by Edgaras (Stellardrone), under a CC BY 3.0 license:

Eternity Light Years 2013
Comet Halley Light Years 2013
Billions and billions A moment of stillness 2011
Twilight A moment of stillness 2011
Between The Rings Between The Rings 2017

Playback is managed by the Howler code base.

Special thanks

All beta testers for their comprehensive feedback! Among them a special mention to Lucas LeSlo for outstanding help.


What does the name Gravirinth mean?

Gravirinth is a combination of the words Gravity and Labyrinth. It was coined by contemporary exoarchaeologists, because the extrasolar name is unknown.

How deep is the Gravirinth?

As far as the sonars can tell, the Gravirinth is composed of a multitude of interconnected chambers of various sizes. Depending on how a chamber is defined, this number may vary, but probably more than 32. Some puzzles span multiple chambers, an some chambers comprise multiple puzzles.

How many fourfold orbs can be collected in Gravirinth?

Certainly more than 12. The exact number eludes most exoarchaeologists.

The ultimate purpose of the fourfold orbs within the Gravirinth is unknown, although it may contribute to a more accurate classification of alien life traits such as inventiveness and persistence or simply reward exploration.

What inspired Gravirinth?

The exoarcheology theme was inspired by Michio Kaku's Future of Mankind.

The game mechanic emerged naturally, drawing elements from Play Mini Gemini Replay (basic platform mechanics), Whirpuzzle (idea of rotation and space theme) and Tiaradventur (inventory, narrative system, management of a large word map), whose source codes are openly available.

Specific gravity is also a central theme of the game Manifold Garden.

How is Gravirinth ambitious from a coding point of view?

The features below make a great game experience and are a puzzlescript coding challenge:

  • a large animated world map;
  • a camera directing system;
  • a message selector, for storytelling and strategic hint placement;
  • a smart action counter;
  • inventory/dialogue display banners, trailing along with the camera;
  • progressively revealing and activating unseen areas.

Altogether, these features required more than 4000 lines of puzzlescript code, including the main labyrinth's 5734 tiles - laid by hand and thoroughly tested, since a single tile may mean the difference from an hard puzzle an impossible one.

Custom sound effects and a background music playlist were linked to the puzzlescript engine.

Is Gravirinth notable in other ways?

Gravirinth is also the world's first fully commercial puzzlescript game.

What will be the price tag?

Depending on your favourite currency:

Currency Price
BRL 20
RUB, INR 400
JPY 700
KRW 7000

Reserve your seat now in the expedition to the Gravirinth!

Book now!

Rate this Game!

Share it: