Skip to content
Geeky Alien
Project Rhombus

Screenshots

Project Rhombus screenshot 1
Project Rhombus Launch Trailer trailerWatch trailer on Steam ↗

Project Rhombus

SEROSOO · Published by PsychoFlux Entertainment

Very Positive — 93% positive (1,400 reviews) · 4 achievements

Last updated 27 Sept 2026

Project Rhombus is a rhythm-based casual action game that combines exciting electronic music with stylish flat design. Hold on as long as possible, blocking the oncoming arrows moving to the beat.

ESRB eFull Controller Support

£0.95

Lowest price we've ever recorded

View on Steam

Prices can lag the live Steam store — always confirm before buying.

Price history

3 Sept 2026Lowest: £0.95 · Highest: £0.959 Oct 2026

Action, Indie, Free To Play, Casual · 2017 · More under £5 games

In Project Rhombus, dodge and block arrows to the beat of electronic music. Created by SEROSOO, this casual but challenging indie game offers stylish flat design and endless fun for fans of rhythm games.

About this game

Project Rhombus is a rhythm-based casual action game that combines exciting electronic music with stylish flat design. Hold on as long as possible, blocking the oncoming arrows moving to the beat.

Features

  • Music with sensual beat
  • Minimalistic graphics
  • Easy to learn, quite hard to master
  • 100% free!

in honor of Toby Fox

System Requirements

Will my PC run this? →

Minimum

Minimum:
  • OS *: Windows Vista / 7
  • Processor: 1 GHz 32-bit or 64-bit processor
  • Memory: 1 GB RAM
  • Graphics: CPU-integrated or on-board graphics
  • DirectX: Version 11
  • Storage: 120 MB available space
  • Sound Card: DirectX-compatible sound card

Supported Languages

English

Latest news

  • AnnouncementsOfficial

    Policy Changes For Free Games

    https://steamcdn-a.akamaihd.net/steamcommunity/public/images/clans/6188768/04e01f130a8599d0f70684fc6a79f864b017f9a3.png Greetings from PsychoFlux Entertainment! We're going to talk about the change of our pricing policy, for most of the free games we're servicing. We have been servicing a lot of free games by offering main game for free, with an $1 empty DLC for donations; so the users who are satisfied by the game are able to support us and the developers by purchasing the DLC, which also makes the game stay in your Steam library. However, some of the players told us that the game won't stay in their library even after purchasing the DLC, so they had to visit the store page to install it again. Thus we're going to make some changes to solve this problem and give some advantages to the purchasers. — Steam Edition Free games will be switched to Steam Edition, which will cost about $1. If you already purchased the Donationware DLC, you will automatically receive the Steam Edition of the game. Also, games that support a leaderboard will also start to support Steam Leaderboard, so you can upload your score at both of them. Steam Cloud and Steam Achievements will be the same as before. We're planning to update the games that are not supporting these features, so please allow us some time. And maybe we might add Steam Trading Cards, too! New Free Version An alternative free version will be added on Steam to compensate former version. Download button will be displayed on the store page, along with the purchase button for the Steam Edition. This new free version won't support any Steamworks features such as Steam Achievements, Steam Cloud and Steam Leaderboard, etc. Achievements that you already unlocked won't go away, but you won't be able to unlock new ones. Your score will only be uploaded on the default leaderboard. Donationware DLC These DLCs will be gone from the store. As we mentioned, holder of these DLCs will automatically receive the Steam Edition game. — These ch...
    Read full article on Community Announcements (PsychoFlux Entertainment)
  • Patch NotesOfficial

    Steam Achievements & Store Page Update (July 11, 2018)

    Steam Achievements To test the Steam Achievements feature, we've added some of them to the game. The added achievements are: Easy 60" Score the record of 60 sec. on Easy difficulty Normal 60" Score the record of 60 sec. on Normal difficulty Hard 60" Score the record of 60 sec. on Hard difficulty Expert 60" Score the record of 60 sec. on Expert difficulty After we've confirmed that these are working properly, we're going to add some more. Something like, "Score the record of 120 sec. on ~~ difficulty", or "Fail for X times". If you have any idea, please let us know in the Steam Community. Steam Store page To make the game title more recognizable in the Steam Store, the logo images were modified slightly.
    Read full article on Community Announcements (PsychoFlux Entertainment)
  • Patch NotesOfficial

    Update Dec. 15th, 2017

    System Progress saves We changed the method saving the game progress. Now your progress data will be stored in *.sav files instead of old *.dat files. If you launch the game after the update, the game will automatically read the data from the old files and create a new ones. However, the data will be reset on devices where the "line 41" error has already occurred. Therefore, please make sure you start the game on a device where the game is yet playable. Once the data conversion is complete, the "line 41" error on the other device will also be resolved.
    Read full article on Community Announcements (PsychoFlux Entertainment)
  • Patch NotesOfficial

    Update Dec. 15th, 2017

    System Progress saves We changed the method saving the game progress. Now your progress data will be stored in *.sav files instead of old *.dat files. If you launch the game after the update, the game will automatically read the data from the old files and create a new ones. However, the data will be reset on devices where the "line 41" error has already occurred. Therefore, please make sure you start the game on a device where the game is yet playable. Once the data conversion is complete, the "line 41" error on the other device will also be resolved.
    Read full article on Community Announcements (PsychoFlux Entertainment)
  • Patch NotesOfficial

    Update Dec. 13th, 2017

    Before we start; we found that the recent "line 41" error was caused by the corruption of the file which contains your configuration data. From now on, please make sure you don't turn off the Steam client before the cloud synchronization is over. http://cdn.akamai.steamstatic.com/steamcommunity/public/images/clans/30942649/287897e58325cdd934632508e0b4e19ba3439c27.png ▲ Synchronization ongoing http://cdn.akamai.steamstatic.com/steamcommunity/public/images/clans/30942649/1bb6d7f9e92952ef765e1a56c8631b661f3ffaad.png ▲ Synchronization done System Data Initialization If an error is found in the saved data, the game will automatically reset it rather than crashing. Window resizing Now you can resize the game screen while it's in windowed mode.
    Read full article on Community Announcements (PsychoFlux Entertainment)

We use strictly necessary cookies to run this site. We don't currently set any analytics or advertising cookies. See our Cookie Policy for details.