SHIP BUILDER
The SHIP BUILDER update is coming soon. You will be able to build your very own ships and sink them in Water Physics!
Game guide
Water Physics — Getting started with the tutorial
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About
OverviewWater Physics is a sinking ship simulator on Roblox where you decide how every ship goes down. You can punch holes in the hull, flood compartments, fire rockets and torpedoes, and reshape the ocean itself — all driven by real physics so no two sinkings ever look the same.
What is on this page
Contents
01
Getting started with the tutorial
Step
In short
Running through the tutorial first saves you a lot of guesswork later.
When you first load in, the game walks you through the core controls. It covers how to move the ship, how to open holes in the hull, and how to use weapons. Once you have the basics down, the rest of the game opens up and you can experiment freely.
- Follow the on-screen prompts the tutorial covers ship movement, hull damage, and weapon use.
- Try every tool it gives you each one affects the ship differently.
- Use your first ship to experiment nothing is at stake, so push every option as far as it will go.
02
Ways to sink a ship
TableIn short
Each destruction method floods or breaks the ship differently.
The game has no scripted events and no preset story — the physics engine decides everything in real time. That means the same hole in the same spot can produce a different sinking every single time. You can go slow and surgical or fast and explosive depending on what you want to watch.
| Hull holes | water enters the flooded compartment gradually, and the ship lists and sinks over time. |
| Rockets | deliver instant, concentrated damage to a section of the hull. |
| Torpedoes | hit below the waterline for a different flooding pattern than surface rockets. |
| Multiple simultaneous holes | changes the water-pressure balance across compartments. |
| Staged destruction | opening holes one at a time lets you watch each compartment fill before adding the next. |
03 Live and upcoming events
Events
いま開催中・開催予定のイベントです。期間が決まっているので先に確認しておきましょう。
04
Ocean customisation options
CheckIn short
Changing the ocean environment before you sink a ship makes every run feel like a different scenario.
The ocean itself is fully customisable. You can drive the ship around in an ocean customised with icebergs, sea mines, massive waves, and even tsunamis.
- Icebergs placed in the path of the ship add collision damage.
- Wave height can be tuned anywhere from a calm sea to a full storm.
- Tsunamis can capsize a ship dramatically.
- Sea mines can be scattered across specific zones to trigger hull damage at a specific location.
- Driving the ship yourself lets you steer straight into any hazard you have set up.
Stuck? Try a video
[⛴️] Water Physics [CRUISE FERRY] Gameplay
05
Spawning NPCs
Tips
In short
NPCs add a human dimension to every sinking and make the chaos feel more alive.
Spawning NPCs is optional but adds to the experience. Watch them scramble to the lifeboats before rescuing them.
Tips worth knowing
- Watch which direction they move as compartments fill — they head for the lifeboats.
- Rescue them by getting to the lifeboats before the ship goes fully under.
06
Solo play vs. multiplayer
Table
In short
Both modes use the same physics, so pick whichever fits how you want to play today.
You can play solo or multiplayer, either in a public lobby or a private game with friends.
| Solo | play at your own pace with no interruptions. |
| Private game | invite friends and build a shared scenario together. |
| Public lobby | play alongside others in a public session. |
07
Free-to-play scope
Summary
In short
Everything at the core of the game is available without spending anything.
All the main destruction tools and every ocean customisation feature are free.
Hull damage tools
free
Rockets and torpedoes
free
Ocean settings (icebergs, waves, tsunamis, sea mines)
free
NPC spawning
free
Solo, private, and public lobby modes
free
Glossary
Glossary- Compartment
- A section inside the ship's hull that fills with water when a hole is opened nearby.
- Buoyancy
- The upward force water exerts on the ship — when flooding overwhelms it, the ship sinks.
- Dynamic destruction
- A system where no sinking follows a preset script; the physics engine calculates every break and flood in real time.
- Lifeboat
- A small vessel on deck that spawned NPCs scramble toward when the ship begins to go down.
- Sea mine
- An explosive hazard you can place in the ocean to trigger hull damage at a specific location.
- Private game
- A session only people you invite can join.
Common questions
FAQIs there a goal or a win condition?
There is no goal or finish line. The game is built around watching ships sink with realistic physics, so you set your own terms each time.
Why does the same method produce a different sinking each time?
The destruction system has no pre-scripted events. Every outcome is calculated live by the physics engine, so results vary even if you start from the same setup.
How do I play with friends?
Start or join a private game and invite the people you want.
What do I do if the ship is not sinking the way I want?
Switch to a different tool or change the ocean settings. Rockets and torpedoes break the hull differently from hand-drilled holes, and adding waves or a tsunami on top of existing damage can shift the sinking in a new direction.
Updated Sep 30, 2026
Game updates can change what is on this page. If you spot something, get in touch and let us know.
Game updates can change what is on this page. If you spot something, get in touch and let us know.
