DrainSim

A submerged street at two in the morning does not behave the same way it does at noon in DrainSim, and figuring that out the hard way — showing up with the wrong tools for the wrong hour — is exactly the kind of mistake the game expects new players to make at least once.

DrainSim: Clearing Floods, One Street at a Time

DrainSim puts you in charge of restoring water flow through flooded city streets, using a range of tools from rakes through submersible pumps depending on what a given mission actually calls for. The core loop is less about brute force and more about matching the right tool to the right situation, since a pump that works well in one flooded stretch can be the wrong choice entirely somewhere else.

Each mission is framed as a genuine problem to plan around rather than a task to power through, which shifts DrainSim closer to a puzzle-adjacent simulation than a straightforward cleanup game.

Planning Around Time, Terrain, and Equipment

DrainSim’s missions require real planning — a day-night cycle changes conditions meaningfully, and terrain type affects which tools are actually useful for a given stretch of flooded street. Bringing the wrong equipment for the time of day or the terrain in question tends to slow a mission down considerably rather than making it impossible, which keeps early mistakes from feeling like dead ends.

Players who scout a mission’s conditions before committing to a tool loadout consistently perform better than those who bring a default kit to every job — DrainSim rewards preparation over improvisation more than a lot of simulation games in this space do.

Realistic Water Physics

Water in DrainSim behaves according to genuine physics rather than a simplified animation, which means how a street floods and how it drains both respond to the specific tools and actions a player takes. This realism is central to why planning matters as much as it does — a poorly chosen tool does not just underperform, it can actively interact with the water in a way that makes the situation harder to resolve.

Building and Sharing Custom Levels

Beyond the built-in missions, DrainSim includes a Level Editor that lets players create their own flooded scenarios and upload them to Steam Workshop for others to play. This extends the game considerably past its official mission set, since the Workshop opens the door to scenarios the base game never designed, built by players who have already learned what makes a flooding puzzle genuinely interesting to solve.

Community-made levels tend to lean harder into specific tool combinations or unusual terrain than the official missions do, giving experienced players a way to keep testing planning skills the base game’s difficulty curve eventually outgrows.

Do I need different tools for every mission?

Not every mission, but many do call for a different approach — DrainSim’s terrain and time-of-day variation mean a default loadout of rakes and pumps will underperform on missions built around different conditions.

Is DrainSim finished, or still being developed?

DrainSim is currently in Early Access, meaning the mission set and systems described here reflect an evolving game rather than a fully finished final version.

Can I play community-made levels from Steam Workshop?

Yes — the Level Editor lets players build and upload their own flooded scenarios, giving access to community content well beyond the official mission set.

DrainSim keeps circling back to the same lesson every mission quietly teaches — show up with the wrong rake or the wrong pump for the hour and the terrain in front of you, and the water will make sure you notice.