Is Project Regolith free?

Yes — Project Regolith is free to play, so you can install and play it without buying anything.

Can I play Project Regolith on Mac?

Not natively — Steam lists no macOS version of Project Regolith. Mac players would need a cloud gaming service or a Windows compatibility layer.

Does Project Regolith have co-op?

Yes — Steam lists Project Regolith with online co-op.

Is Project Regolith on PC Game Pass?

No — Project Regolith is not on PC Game Pass right now.

Project Regolith

Name: Project Regolith
Brand: Regolith Interactive
Availability: InStock

Regolith Interactive · November 1, 2023 · Adventure, Co-op, Sci-fi, Puzzle, Space

Project Regolith is free to play — no purchase needed. We track it so you know if that ever changes.

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Mixed70% · 23

Best price

Free

Get it free on Steam

This game is free to play. Get it on Steam →

Screenshots

Project Regolith price

Project Regolith is free to play — there is no purchase price, on Steam or anywhere else we track. We keep watching it, so if it ever stops being free the price history on this page will show when that happened and what it changed to.

About Project Regolith

Explore the Mystery of Outpost Rhea

Project Regolith is a 2-Player Cooperative Puzzler made by a small team of 4 in Melbourne, Australia, where you and a partner are tasked with uncovering the mystery behind the vanished crew of Outpost Rhea, a deep-space research facility overseen by a Corporate body that enforces strict NDA clauses and communications embargoes amongst it's employees.

The rules of time and space are breaking down aboard the station. Communication is key, as the two of you might not be seeing the same thing. Were those walls there before? Did the door just move? Wait, are you walking on the ceiling!?

The station's research has led to some bizarre anomalies that have begun to warp environments on a whim - Explore a series of non-Euclidean puzzles together with your partner to uncover the fate of Outpost Rhea and the experiment at the heart of it all - Project Regolith.

KEY FEATURES

2 Player Coop Puzzling - Team up with a partner, friend, enemy, stranger, or anything in-between to uncover the mystery behind Project Regolith.
Non-Euclidean Spaces - As the anomalies plaguing Outpost Rhea worsen, you'll come across warped spaces that defy physics, and objects that defy your senses.
The Lives of Rhea's Crew - Learn more about the major players aboard Outpost Rhea, from the station's Executive Director, to the humble catering staffers. Thirty (30) collectible Audio Logs tell the story of the station, and help shed light on the experiments aboard the station, and the lives of the crew affected by them. Voiced by an incredibly talented cast made possible by our Kickstarter backers!

Project Regolith — game info

Platforms: Windows
Player modes: Online co-op
PC Game Pass: Not included

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Recommended May 31, 2026

It was an okay game puzzle wise, but the story was fun and the yuri subplot was nice. Puzzles were 50/50 between super easy and concerningly hard to complete for no reason.

1 found this helpful

Recommended May 31, 2026

Good game, could maybe use some clarity in some spots.

1 found this helpful

Recommended May 30, 2026

I don't play many puzzle games but, I really enjoyed this. There are some areas that are not greatly optimized so I had a bit of lag but I'm also on my school laptop. Just played with low graphics and the game still looked great. Loved the voice actors and the little stories in the audio logs. Took a few hours to 100% and it was free so what else can I ask for.

1 found this helpful

Recommended Sep 4, 2026

not bad cuz

Not recommended Jun 14, 2026

Regretting a free purchase really makes a man reflect on the decisions that brought him here. Puzzles range from overly simple to unintuitive and glitchy. But there were a few voice actors that really impressed me. The actor for Dazza was outstanding.

Not recommended Jun 14, 2026

I feel like I overpaid for this game, and I got it for free.

Community reviews

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