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
[] 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.
DrainSim EA 0.3.1.05 - Muddy Mess Update
Finally giving the bucket a proper purpose.
This update introduces the new digging and placing mechanic. Hold more buckets in your toolbar to fill them with dirt while digging, then place the dirt again by right-clicking. Redirect water however you want and experiment with different solutions.
This update also adds the new Construction Site level, built around deeper flooding and the new digging gameplay systems.
Added new level - Construction Site
Added digging and placing mechanic
Buckets can now be filled with dirt while digging
Added digging mechanic hints and updated tutorial support
Added separate options for time challenges and leaderboards
Improved water interaction and water simulation stability
Improved hose and power cable navigation and placement
Improved navmesh and water measure performance
Improved exiting water movement behavior
Adjusted mantling and vaulting sensitivity
Adjusted maximum walkable slope angle
Adjusted climb out of water threshold
Fixed infinite dirt climbing
Fixed water height savegame issues
Fixed digging related memory leak
Fully disabled digging while swimming
Fixed big drains sometimes not working
Final fix for big drains, I promise
Construction Site gameplay, terrain, collision, drainage and water flow improvements
Construction Site: fixed south drain
Construction Site: fixed broken material on yellow tube
Parking Garage: removed floating dirt pile again
Fixed multiple Downtown Station and Industrial water interaction issues
Fixed toolbar icons and tool thumbnails sometimes not loading
Fixed vehicles and tools sometimes not loading on level start
Various gameplay fixes, collision fixes and overall polish
- Updated leaderboard logic and improved cheat prevention
- Removed default trophy from garage
Leaderboards now include basic anti-cheat measures.
Invalid or impossible scores may be removed, and accounts may lose access to leaderboard submissions.
DrainSim EA 0.2.2.03 – Leaderboards & Trophy Update
Added leaderboards to the game, accessible in the completed missions UI in the garage Leaderboards reset each month
Added leaderboard trophy shelf in the garage Trophies record the best placement you have ever achieved per level Current month trophies can still change until the month ends
Downtown Station: adjusted water collision on overpass
Downtown Station: added geometry behind overpass stairway to prevent dumping water outside the level
Downtown Station: added stairs to middle platform
Fixed tools disappearing when endscreen appears
Removed some decal sprays due to trademark issues
Fixed missing street in Industrial
Improved performance in Parking Garage and Downtown Station
Adjusted leaderboard UI layout and spacing
Optimized leaderboard and trophy loading logic
Added magnet fishing to leaderboards for consistency
DrainSim EA 0.2.0.02 – Welcome to Downtown Station
Added new level - Downtown Station
Included multiple gameplay, collision, water flow and performance adjustments for the new level
Adjusted hose placement grid positions
Improved shader pre-compile logic for smoother gameplay
I know these patch notes look short, but most of the new level changes have been summarized since a lot of iteration happened on the unstable branch.
- Added Generator MK2
- Replaced AI voice with human voice (intro and radio)
- Added and improved translations across all languages (including Simplified Chinese fixes)
- Improved performance with CPU, RAM and VRAM optimizations
- Improved loading logic for more reliable initial water levels
- Improved performance in Convenience Store, Tutorial and Midtown Market
- Fixed water surface map not updating during canal breach and digging
- Improved overall water stability and initial water behavior
- Tool slot switching now selects a free slot automatically instead of dropping tools
- Improved hose and cable performance and handling
- Fixed higher tier tool spawn locations
- Fixed airborne pumps on level start
- Fixed mission board showing incorrect mission info when entering garage
- Fixed replay start time not resetting properly
- Fixed duplicate pipe water source bug
- Fixed tool duplication on load
- Fixed mission board UI issues
- Fixed water measure skipping between low and high states in the intro basement
- Improved performance on Midtown Market
- Adjusted loading logic to reduce AMD crashes (may cause temporary water instability on first load - reloading fixes the issue)
- Fixed water clearing for vehicles to prevent standing waves
- Fixed voice settings not affecting audio
- Industrial: improved water collision, especially in service alley
- Fixed extending hose from placed pump ignoring tier
- Fixed replaying a mission not resetting start time
Current Release
23600505
Uploaded Jun 07, 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
3.3 GB
23600505
1675A397
62d06bfc3a863691f737b6ed1f1a41b3a1ae8a79cd60e38d52ed99fbf424d05b
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View AllDownload 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.