Suit up. Cycle the airlock. Get off the rock.
Play Tranquility — free, in your browser
A PS1-era first-person escape set in an abandoned domed moon base. The crew is gone and the lander is waiting on the surface — but the airlock won't cycle until you're in a full EVA suit, and the four suit parts are locked away. Read the crew's notes, work a keypad from the quarters roster, reset a tripped breaker bank in the right order, dial the boots maglock to cabin pressure, then arm the O₂ pack from the master code. Step out onto real lunar ground — cratered, ridged, and lit by hard unfiltered sun — and cross it in low gravity on a ticking oxygen tank. Your tank only refills at the dome apron, the landing pad and one field cache, so the route is the puzzle. Reach the lander, board it, and watch the ascent stage leave the descent stage behind. Free to play in your browser on desktop and mobile, no download.
Read the mission briefing, then press BEGIN — the clock starts there, not on the loading screen.
Open the mission terminal in the dome to see which of the four suit parts you still need, and the master-code fragments you have collected so far.
Each suit locker is a separate puzzle: the helmet keypad wants the crew quarters in wake order, the gloves bank wants its breakers thrown in sequence, the boots maglock wants the cabin-pressure dial, and the O₂ pack wants a master code built from the three other lockers’ fragments.
Read every note — each one tells you the code or order for one of the lockers. The crew quarters at the end of the south-east corridor hold the berth numbers and the duty board.
With all four parts stowed, the airlock light turns green. Cycle it to step out onto the surface — the dome drops to emergency power behind you.
Outside you have a limited oxygen tank. It refills at the dome apron, at the landing pad, and at the supply cache west of the route; nowhere else. Cross the regolith to the lander on the south pad and board it to escape.
The compass ribbon at the top of the screen carries a bearing and a distance for the lander, the dome, the cache and any survey relay you have not brought up yet.
Tranquility is a free PS1-style first-person escape game set in an abandoned domed moon base, playable in your browser. The crew is gone and a lander is waiting on the surface — but the airlock will not cycle until you are wearing a full EVA suit, and the four suit parts are locked behind puzzles. Solve the lockers, cycle the airlock, then cross a real cratered lunar surface in low gravity on a limited oxygen tank to reach the lander and escape.
Yes, Tranquility is completely free to play in your browser. No download, no signup, no paywall.
Read the crew’s notes — each one feeds a puzzle. The helmet keypad wants three berth numbers from the crew quarters entered in wake order, the gloves locker wants a breaker bank reset in the right sequence, the boots maglock wants the cabin-pressure dial, and the O₂ pack takes a master code assembled from fragments the other three lockers print. Suit up, cycle the airlock, and cross the regolith to the lander before your oxygen runs out.
You do not lose the run. The suit blacks out, tells you the tank is empty, and an emergency recall puts you back in the airlock with a full tank — but the clock never stops, so a blackout costs you the whole walk back out. The tank refills at three places and three only: the dome apron, the landing pad, and the field supply cache to the west.
Six landmarks give the plain a shape you can navigate by — a survey mast, an overturned rover with a readable log plate, the base solar farm, an old landing site with a commemorative plaque, a supply cache that refills your tank, and a station perched on the rim of a forty-metre crater. Three survey relays are scattered among them. Bringing the relays online is entirely optional, costs oxygen, and earns nothing but a line on your results card.
A jump carries you roughly ten metres and takes about a second and a half. There is no air, so once you leave the ground you keep exactly the speed you left with and get almost no steering until you land — a leap is a commitment. Loose regolith on a steep crater wall will slide you back down, and anything past about fifty degrees cannot be climbed at all.
A first escape usually takes ten to twenty minutes of reading notes and working out the codes. After that it becomes a speedrun: the whole run is timed against a global leaderboard, and once you know the four solutions a clean route can finish in a few minutes.
Yes. On phones you move with a virtual stick, look by swiping, and use on-screen buttons to interact, run, and jump. Desktop plays with WASD and mouse look. The pause menu carries volume, look sensitivity, an invert-look option, a reduced-effects mode and a shadow-quality setting on both.
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