Planet Gemini

Planet Gemini

decidone · May 21, 2026 · Automation, Base Building, Tower Defense, Online Co-Op, Procedural Generation

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

PC
Positive95% · 19
This game is free to play. Get it on Steam →

Screenshots

Planet Gemini price

Planet Gemini 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 Planet Gemini

Planet Gemini is a factory-building and tower defense game. After crash-landing on two planets during an interdimensional journey, fend off waves of enemies and research a portal to survive.

FEATURES

  • Two Planets: Teleport between two planets with different resources, and build bases to defend against enemies.
  • Co-Op: Managing two planets alone isn't easy. Team up with a friend in 2-player co-op and take on harder difficulties.
  • Factory Automation: Gather resources and unlock technology to build more efficient automated facilities.
  • Tower Defense: Build defensive lines with the resources you produce and protect your base.

Planet Gemini — game info

Platforms
Windows
Player modes
Single-player, Online co-op
PC Game Pass
Not included

What Steam players say

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

Not recommended Jun 13, 2026
Just weird and really lacking in a tutorial. 3 buttons to get logs from a tree seems incredible silly. its good for the price. but really lacking in polish or charm
5 found this helpful
Recommended Aug 1, 2026
👍
3 found this helpful
Recommended Sep 20, 2026
There are many factory games out there. But Planet Gemini is 'one of those' out of all of those that stands out more compared to the other 5 factory game demos I played recently. As a Mindustry pre-v32 player I have the same feeling playing this game as playing Mindustry back then in 2018/2019. This game has potential. One of the most unique features that this game masters better than others is the role of toplogical determinism. Belts have a 'topological snap-on' that penalizes careless building but is technically (also provably through maths) cleaner to build with. It takes some time to get used to but allows for nifty, space-conserving and topologically approved builds, especially considering that Conveyer tunnels do not allow side input and that splitters can be programmed from the get-go. Having two planets causes for me that one is always a mess and the other is always slower developed, but developed with more care than the first planet. Kind of how our analytic and creative part of our brains work together. The fact that the game has an internal economy makes it highly potent for PvP/CoOP and even MMO-RPG at some point (if the RPG aspects of the game get developed furthe…
2 found this helpful
Recommended Jul 2, 2026
I like it. Similar to Satisfactory if it were 2d. Also, contradictory to what the negative reviewer says, there is a tutorial in the upper left of your screen.
2 found this helpful
Recommended Jun 15, 2026
peak game only down side is no one to play this with
2 found this helpful
Recommended Jul 9, 2026
The game is fun. It has some kinks.
1 found this helpful

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