DrainSim
Steam News 29 March 20261mo ago

Big Demo Update – Tutorial improvements, Voice Over & Major Improvements

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 st…

Update log

Full DrainSim update

The complete published notes, normalized for clean reading and source attribution.

Extracted changes

8 fixes2 additions14 changes2 removals
  • Performance
  • Workshop
  • Gameplay
  • Fixes
  • UI and audio
changedMajor performance improvements and reduced VRAM usage
fixedImproved water simulation stability and fixed multiple infinite water source bugs
changedImproved tool interaction logic and pickup behavior
changedHolding mouse button now continuously uses tools (shovel, rake, squeegee)
changedImproved cable, hose and pump connection logic
addedAdded failsafes to prevent broken water behavior when placing and removing equipment

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

  • Introadded basement area
  • Introimproved tutorial flow and interaction logic
  • Introfixed progression issues and softlocks
  • Introimproved basement water behavior and blocking
  • Midtown Market: performance improvements

  • Midtown Marketadjusted dirt regrowth behavior
  • Midtown Marketimproved water flow handling
  • Magnet Fishingfixed trash spawning issues
  • Magnet Fishingfixed magnet interaction bugs (including teleporting to world origin)
  • Magnet Fishingimproved interaction reliability

Source

Steam News / 29 March 2026

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