About the Game
Day-Night cycle and realistic water physics!
Plan your Mission!
For each mission, you'll receive crucial intel in advance and must carefully plan the tools you want to bring. Consider the time of day, type of terrain, and distance from your generator to your electric tools. Working late into the evening? Don't forget floodlights! Need to drain multiple areas simultaneously? Bring extra pumps and generators! Is there digable Ground? Better bring a Shovel!
With each mission success, you'll earn recognition and unlock new tools and upgrades to boost your drainage capabilities.
Loads of different tools and unique Levels
Armed with an assortment of drain-clearing tools and equipment, from your trusty rake to water pumps, you'll tackle every challenge with precision and skill. From casual players to seasoned pros, DrainSim offers an engaging experience for all who seek the satisfaction of restoring order to the city's drainage system. So dive in, roll up your sleeves, and let DrainSim flush away your concerns one drain at a time.
Screenshots
24 images
Version Information
Steam Patch Notes
Official update history
- Carnival: improved performance
- Event content is no longer loaded when event effects are disabled
- Improved RAM usage and performance
- Fixed tablet minimap jitter when walking
- Fixed bucket not appearing
Known issue: the Continue button does not correctly select the previously played save slot. So use manual loading instead.
- Fixed buckets flying around when loading a level
- Set fixed starting positions on the truck for the pipe wrench, cables, squeegee, rake and shovel
- Added a setting to turn off tool glow
- Level Editor: added wave interval and start delay settings to water sources
- Carnival: fixed Galactic Glade Ride sometimes spawning water
- Fixed OpenColorIO bug
- Added versioning to PSO shader precompilation to clear outdated shader caches at launch
- Fixed seasonal fog not showing
- Adjusted planter bed collision
- Removed AI-generated artwork from the Carnival level. These images came with a purchased asset pack, and I hadn't noticed them before release. Thanks for pointing them out!
- Carnival: added a slight slope to the Circus area
- Fixed barriers not blocking water
The Carnival is ready to try on the unstable branch!
I've also added the Halloween content, but that won't be active until October 24. It'll switch on automatically, so you won't need another update for that.
Give the new level a try and let me know how it plays. Let me know if anything breaks or feels off, too.
Added new level - Carnival
Added Halloween content, which activates automatically on October 24
Improved performance across all levels
Fine-tuned digging and placing dirt
* Improved Workshop level loading for better GPU stability on older hardware
* Workshop levels now keep water paused while restoring saved water heights
* Campaign levels now keep water paused until loading is complete to reduce water spikes
* Fixed Workshop savegames
* Fixed Workshop level endscreen showing incorrect target times
* Removed the Save button when playing Workshop levels
* Improved dirt placement to remove small floating fragments and prevent floating stairs
* Level Editor: added navigation preview button and fixed foggy weather
* Downtown Station: fixed navigation from the rails to the platforms and fixed the subway mesh
* Construction Site: fixed non-diggable drain near the forklift
* Slight RAM and VRAM improvements
- Fixed non-diggable drain near the forklift on Construction Site
- Slight RAM and VRAM improvements
- Fixed Downtown Station navigation from rails to platforms
- Removed save button when playing Workshop levels
[] Improved Construction Site balance and progression
[] Adjusted water inflow, drainage layout and water behavior
[] Improved terrain shaping, slopes and pit layouts to better guide water flow
[] Improved visibility of drainage progress in key areas
[] Increased bucket capacity by 50%
[] Made climbing and vaulting out of water easier
[] Fixed water height savegames
[] Fixed voxel savegames on Convenience Store and Parking Garage
[] Fixed missing mud on Convenience Store
[] Fixed cable height detection
[] Construction Site: removed terrain spikes and visual issues
[] Various Construction Site gameplay, collision and drainage improvements
- Fixed voxel savegames on Convenience Store and Parking Garage
- Fixed missing mud on Convenience Store
I know the new level is a hard one, it would be better for the games development if you keep that feedback to the discussion hub or the discord instead of reviewing the game negatively instantly out of frustration. I will see how people adjust to the new digging mechanic over the next few days and balance the new level from there.
- Fixed cable height detection
Current Release
Build 26492138
Uploaded Nov 09, 2026
System Requirements
How to Install
DrainSim.exe to play
Troubleshooting tips
• Run Redist/_CommonRedist installers if game won't start
• Add folder to Windows Defender exclusions
• Run as administrator
Download
Direct link available
Needed when extracting (WinRAR / 7-Zip) — not a site login.
You May Also Like
View All
Download DrainSim for PC with a direct link or via torrent. Get the full version of DrainSim for free. DrainSim is a Casual released by CodePeas.