About the Game
Campaign
Explore the new Open World Campaign with a dozen worlds and 100+ new levels. Jumps, Hydraulics, ‘Normal’ Bridges, and more giving you hours of gameplay to enjoy! Take a flying leap in Vaulting Towers or flex those hydraulic muscles in Bifrost Bend!Sandbox
Let your engineering creativity flow with no restrictions in Sandbox mode, allowing you to push your bridge building skills to the limit. Challenge your friends and the community by designing intricate levels and publish them online for everyone to enjoy.Community
Explore virtually infinite content and challenges designed by the community in the Steam Workshop. See what bridge designs other players come up with and show off your own in the Gallery. Challenge yourself and others by competing for the top spots in the cut-throat leaderboards and histograms.Custom Physics
Our custom physics engine gives total control, reliability, and accuracy to your bridges. Sleep easy at night knowing your bridges will perform consistently every time!Customization
- Mods
Mods allow you to customize your game to suit your tastes. Modify the game’s settings, include new options, change vehicle or material defaults, translate your game with player supported language packs, and more! - Decorate
Add visual flair to your level with a whole range of decor objects. Alongside generic items (traffic cone, rocks, hot air balloons, etc.), each new biome comes with a set of themed decorations as well. Paint a happy little scene, there are no limits here. - User Generated Content
Create your own vehicles, boats, planes, decorations, and textured custom shapes to add to workshop levels. Let your imagination soar! Share them with the community and download things made by other players.
Loads of new features
- Build Zones
It’s time to think inside the box! You can only build within their borders, like a reverse boat or plane. Are you up to the challenge? - Pre-Built Materials
Showing is much more effective than telling. Pre-Built materials can be included with a level on loading, giving you a helping hand or another obstacle to overcome. Work around them or incorporate them into your bridge designs. - New Material: Foundation
Support long bridges with a strong foundation, or two! Expensive yet very effective at reducing stress in key positions.
Screenshots
6 images
Version Information
Steam Patch Notes
Official update history
Poly Bridge 3 Small Update
Twitch Integration: The native Twitch integration feature has been retired. Due to low overall usage, the server infrastructure costs required to host and maintain this service are no longer sustainable.
We want to thank the community members and streamers who engaged with this feature during its run!
This small patch fixes an issue with the Weekly Challenges thumbnail not appearing when in the last 24 hours of the countdown.
Thank you for playing Poly Bridge 3!
We had some additional unexpected problems with the switch to automated looping Weekly Challenges. This update addresses all known issues... thank you for your patience!
Looped Weekly Challenges will now:
Use the same Gallery as the original Weekly Challenge
Have their own unique save folder (not overlapping with the original Weekly Challenge)
The Seasons dropdown menu in the Weekly Challenges UI now sorts seasons with most recent at the top (this is a bit more user friendly, especially as the number of seasons gets larger over time).
We had some additional unexpected problems with the switch to automated looping Weekly Challenges. This update addresses all known issues... thank you for your patience!
Looped Weekly Challenges will now:
Use the same Gallery as the original Weekly Challenge
Have their own unique save folder (not overlapping with the original Weekly Challenge)
The Seasons dropdown menu in the Weekly Challenges UI now sorts seasons with most recent at the top (this is a bit more user friendly, especially as the number of seasons gets larger over time).
There was a glitch in the matrix that was preventing Season 16 in the Weekly Challenges from starting. This has been fixed with this small update!
After 15 incredible seasons and 150 Weekly Challenges, we are introducing a new automated rotation. Moving forward, Poly Bridge 3 will cycle through these 150 classic challenges indefinitely, featuring a fresh leaderboard every time they return!
This update is perfect if you:
Missed out on an older Weekly Challenge.
Want another shot at reclaiming a top rank.
Are brand new to the game.
Seasons will continue to march forward as before, with Season 16 up next. Rest assured, all previous Weekly Challenges and past leaderboards will remain fully accessible in the game.
This regular update brings some Quality Of Life improvements and bug fixes. Thank you to the Poly Bridge 3 community for the continued feedback and support!
Sandbox
Added "Show In Build Mode" toggle for multi-selected Decor objects
Added Undo step after changing "Uniform Scale" for Decor objects
Fixed bug with vehicle labels showing in Decor Mode if previously hovering over vehicle in Build Mode
Fixed issue with selection sets not moving up/down when including boat locked to water line
Fixed issue with Toxic landmass not displaying properly in Sandbox when 6.25m tall
Event Editor
Added Undo step after moving icons in Event Editor
Maintain scroll position in Event Editor when items get selected
Fixed issue with scrollbars not hiding when Event Editor is collapsed
Fixed orphan icons issue when deleting objects while dragging them in Sandbox
Custom Shapes
Fixed issue with custom shape color being incorrectly set to white in some cases
Fixed issue with being able to move or delete custom shape anchors and pivots from non-selected shapes
Simulation
Removed small camera rotation in simulation when right-clicking in 2D mode
Fixed uncommon case of boats/planes not colliding with bridge pieces
Fixed T (stress vis) causing piston/spring tooltips to show up in simulation
Mods
Fixed MOD Api not returning bridge edges for prebuilts in some campaign levels
This update rebuilds Poly Bridge 3 using the latest version of the Unity engine. It addresses underlying security vulnerabilities and ensures continued compatibility and stability.
No gameplay or content changes are included in this update.
Patch 1.5.8 is a small hotfix to fix a regression introduced in 1.5.7
Use grey color to indicate disabled nodes and pistons in the Hydraulic Controller (was using green)
This small update brings some Quality Of Life improvements and bug fixes. Thank you to the Poly Bridge 3 community for the continued feedback and support!
Patch Notes
Added Quicksave (F6) for saving bridges when playing Campaign or Workshop levels
When hovering over a vehicle, bring all vehicle checkpoint and flag labels to the foreground
Better distinguish edge highlighting between selection and split joint hovering
Make nudge for springs work in 10% increments
Add workshop ID to copy-to-url output for Workshop Levels
Removed "by:" in copy-to-url output
Fixed gamepad legend height issue
Gamepad improvements for Sandbox Mode
Added button to visit Steam Page for our upcoming new game Poly Bricks! (Press "P" to hide)
Current Release
20810863
Uploaded Nov 18, 2025
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System Requirements
How to Install
setup.exe
Troubleshooting tips
• Run Redist/_CommonRedist installers if game won't start
• Add folder to Windows Defender exclusions
• Run as administrator
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Download Poly Bridge 3 for PC with a direct link or via torrent. Get the full version of Poly Bridge 3 for free. Poly Bridge 3 is a Simulation released by Dry Cactus.