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.
- Fixed cable height detection
DrainSim EA 0.3.0.00
NEW LEVEL: Construction Site
Fitting to the new digging mechanic, this level features deeper water levels and more difficult flooding situations than previous missions.
The level is still in a rough state, so feedback is very appreciated!
Added new level – Construction Site
Improved performance for water measure zones
Fixed infinite dirt climbing
Fixed dirt columns not being high enough when climbing with them
Fixed infinite water sources on walls in Downtown Station
Fixed water interaction on Industrial and Downtown Station
DrainSim EA 0.2.3.00
Added dig and place mechanic
Buckets can now be filled with dirt
Adjusted all existing levels to support the new digging mechanic
Separate options for time challenge and leaderboards
Improved navmesh performance on Farm
Fixed tool thumbnails sometimes not appearing in toolbar
Removed toolbar flicker when changing tool slots
Fixed magnet fishing rope sometimes not loading properly
Fixed missing garbage disposal objects on Downtown Station
Buckets in the toolbar are automatically filled while digging.
Tutorial adjustments for the new digging mechanic will follow.
If you'd like to help test the new changes, you can join the unstable branch through the game's Steam Properties -> Betas tab.
- 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.
- 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
This is only a condensed list.
This one’s for the demo. Steam doesn’t give me a separate place to post demo updates,
so it’s going here:
Major performance improvements and reduced VRAM usage
Improved water simulation stability and fixed multiple infinite water source bugs
Improved tool interaction logic and pickup behavior
Holding mouse button now continuously uses tools (shovel, rake, squeegee)
Improved cable, hose and pump connection logic
Added failsafes to prevent broken water behavior when placing and removing equipment
Improved savegame system including water height, tools and equipment states
Fixed multiple bugs with pumps, hoses and inflatables not behaving correctly
Improved replay system including rewards and endscreen feedback
Disabled shop in magnet fishing levels for now
Improved audio including water movement sounds and radio balancing
Replaced radio voice with a human voice actor
Disabled mouse smoothing and improved input handling
Fixed various input bugs including deadzones and blocked keys
Fixed multiple UI and interaction issues (whiteboard, hints, menus)
Fixed multiple crashes including Linux Proton related issues
Intro: added basement area
Intro: improved tutorial flow and interaction logic
Intro: fixed progression issues and softlocks
Intro: improved basement water behavior and blocking
Midtown Market: performance improvements
Midtown Market: adjusted dirt regrowth behavior
Midtown Market: improved water flow handling
Magnet Fishing: fixed trash spawning issues
Magnet Fishing: fixed magnet interaction bugs (including teleporting to world origin)
Magnet Fishing: improved interaction reliability
- Fixed extending hose from placed pump ignoring tier
- Fixed replaying a mission not resetting start time
DrainSim EA 0.1.5.05
- Short interaction on inflatables now drags out a new hose
- Short interaction on pumps now drags out a new hose
- Adjusted barn water collision on Farm
- Fixed inflatable placement when placed inside bushes
- Fixed inflatables hovering after loading a savegame when placed too close to a wall
- Fixed hose attachable from pump even while a barrier is already inflating
- Fixed mouse view deadzone
- Fixed barrier inflow stopping after repeatedly adding and removing hoses
- Removed incorrect water collision boxes in the main Church room
- Fixed infinite pump water suction when looking into the sky while placing a hose
- Fixed interaction actors from original hose locations appearing when attaching barrier to pump
- Fixed barrier hoses being extractable from non-placed barriers
- Fixed infinite water sources when attaching pump hoses to barriers and then picking up the pump again
- Pump can now connect to placed inflatables and vice versa
- Made rating system future-proof for upcoming updates
- Fixed some Church actors blocking water
- Fixed rating sometimes not awarding 5 stars correctly
- Fixed leaks sometimes teleporting the player to 0 0 0
- Fixed double interaction issue
- Holding mouse button now continuously shovels, rakes, or squeegees
- Improved cable connection logic
- Fixed interaction bug on whiteboard
- Fixed broken meshes on Farm
- Fixed navigation at Parking Garage entrance
- Added a drain to Convenience Store street 2 area
- Updated navigation agent radius
- Fixed door collisions ignoring tools on Convenience Store (prevents door getting stuck)
- Added water movement to SFX audio
- Adjusted pump output
- Added pipes to minimap
- Fixed mesh on Parking Garage
- VRAM usage improvements
- Fixed broken pipe savegame issue
- Fixed stickdrift when not moving
- Decreased water inertia on Church level resulting in quicker drains
- Fixed maximum water height for street lot 2 on Convenience Store
- Lowered Forest inflow
- Fixed vacuum sound sometimes not playing
- Adjusted diggable dirt height on Forest
- Updated measure locations on Forest
- DirectX11 adjustments forcing Nanite, Lumen and Raytracing off
- Fixed rating rounding error
- Fixed bucket animations sometimes stopping too early
- Removed slight left-right movement headbob
- Fixed strange vacuum bug when holding it to the side
- Disabled vacuum tool collision
- Improved interaction detection tolerance
- Fixed pump spawning water sources when turning it on while holding a hose
- Removed extreme forward-backward character sway when quickly changing running direction
- Made power cable preview more obvious
- Improved attaching logic so it is no longer blocked by world geometry and automatically locks to the closest selection
- Fixed Church entrance
- Added multiple checks for piracy achievement unlock
- Implemented Steam DRM
- Fixed height detection on Church level
- Fixed initial maximum water heights after loading
- Fixed Church drains
- Added target 5-star rating UI to the endscreen
- Church: fixed overflowing water near the truck at level start
- Church: pebble is no longer vaultable
- Highlighting power plugs is now more obvious
- Adjusted Church river water source
- Church bushes no longer block water
- Changed power cable preview color
- Converted tool references to soft references
- Added failsafe for dropping tools
- Fixed two Church meshes likely causing crashes
- Fixed dam breach sequence
- Fixed water collision on Church level
- Church: added more drains and adjusted slopes near drains
- Water ignore tag applied to multiple Church meshes
- Unblocked Church second entrance door
Current Release
Build 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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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.