Besiege

Released: Feb 18, 2020
Platforms: WindowsmacOSLinux
Last updated: 05 Sep 2026, 09:40 GMT

Updates & announcements

20 posts

22 Jun 2026Developer post
Besiege: The Broken Beyond is out now!
Besiege: The Broken Beyond is out now! Alongside The Broken Beyond’s release, we’ve also pushed an update containing a bunch of improvements & bug fixes, as well as more level editor objects for you to use! Master Engineer Edition For those of you who’ve already purchased the
19 Jun 2026Developer post
The Broken Beyond - Space Levels
Hello everyone! Today we’ve got our 6th and final development post for The Broken Beyond expansion, which releases in just 3 days time on the 22nd of June! This post is going to give you a sneak peak at some of the new space levels that’ll be dropping with the expansion. The Brok
12 Jun 2026Developer post
The Broken Beyond - Building for Space
Hello everyone! With just over a week to go before launch, we’re going to take a look at building machines for space, examining some blocks in greater detail and exploring some important concepts you’ll want to consider when building your spacecraft! Balancing Load & Fuel So,
Hello everyone!
With just over a week to go before launch, we’re going to take a look at building machines for space, examining some blocks in greater detail and exploring some important concepts you’ll want to consider when building your spacecraft!
[dynamiclink href="https://store.steampowered.com/app/3639470/Besiege_The_Broken_Beyond/"][/dynamiclink]
Balancing Load & Fuel
So, first things first, getting off the ground with your rocket ship!
One of the most important balancing acts you’ll need to embrace when creating spacecraft in The Broken Beyond is ensuring you have enough thrust to get the mass of your machine into space.
There are three elements to this equation you’ll need to balance; Weight, Thrust & Fuel.
The greater your machine’s weight, the more thrust you’ll need to get it off the ground.
The greater your machine’s thrust, the more fuel it’ll use.
The more fuel stored on your ship, the greater its mass (weight). And so on…
With the new blocks added by the expansion, there are a lot of different configurations of boosters and fuel storage for you to experiment with to find what’s right for your machines.
Burning a low amount of fuel to generate a low amount of thrust over a long period is very inefficient. You’ll need to find a good middle ground where you’re generating a good amount of thrust, but not burning through your fuel reserves too quickly.
Those of you who are particularly discerning have already figured out that stacking small fuel barrels together provides more storage than a large fuel barrel while taking up the same space. However, a Large barrel storing 100 Fuel has a lower overall mass than 10 Small barrels storing 10 Fuel each.
However, a key difference between using a single Large Fuel Barrel and using several Small Fuel Barrels, is large ones have better wet to dry mass ratio. This means that a greater proportion of the blocks total mass comes from the fuel it contains and when a Large Fuel Barrel is emptied its mass will be lower than Small Barrels capable of holding an equivalent quantity of fuel.
Another important consideration is that the Large Fuel Barrel has significantly more attach points for linking it to other blocks. This makes it ideal to form the main structure of your machine, whereas Small Fuel Barrels stacked together provide far less points of attachment.
If you’re trying to be space efficient and maximise the quantity of fuel your machine can carry, small barrels are the way to go, but if you’re trying to be efficient with your mass to fuel ratio, large barrels are superior. There are tradeoffs with everything.
Another thing you might want to consider is separating your machine into two separate fuel networks if you’re using boosters and weapons that require fuel, like the Flamethrower or Blaster. If your fuel reserves run low, you might find your boosters draining the ammunition from your weapons to power themselves!
Multistage systems are also a great way to make your spacecraft more mass-efficient, allowing you to jettison empty fuel storage or other systems that are no longer needed to complete your mission.
Steering in Zero Gravity
We briefly touched upon steering in space in our 3rd development post but it’s an area we’d like to expand upon a bit here as well.
For steering in space, there are 3 new main blocks you could use; the Control Thruster, The Inertial Steering block and the Booster block.
The Booster is designed to output large amounts of thrust and that coupled with the fact it consumes fuel, means it’s not ideal for reorienting your machine, unless speed is more important to you than control.
The Inertial Steering block is by far the most effective method for rotating your machine and it scales well with your machines size, making it impactful even with the largest of machine designs.
The Control thrust might offer a degree of finer control than the Inertial block, but the main reason we added it to the game was to allow players to create realistic replicas of real spacecraft. Control Thrusters can technically also be used as a method of low-impact propulsion for maneuvering your craft around in zero gravity.

Both the Control Thruster and Inertial Steering block also have an option for countering rotation, making it easier for you to stop your machine spinning. While this is very useful, it’s worth noting that the Control Thruster has the potential to knock you out of a stable orbit as it makes continual adjustments.
Atmospheres & Aerodynamics
As discussed in previous posts, The Broken Beyond features atmospheres which enable aerodynamic blocks to function.
Aerodynamic forces however are not consistent across all atmospheres as their density can vary, with lower density atmospheres providing less aerodynamic forces on your machine. There also isn’t a hard edge to atmospheres where aerodynamics suddenly cease to function, the forces will fade as you transition into space with an approximation of the barometric formula.
As a practical example, creating a plane for use in a low density atmosphere (like a gas cloud in space) will require its design to maximise lift and propulsion in order to function properly.
We also briefly mentioned in a previous development post that entering an atmosphere too quickly or at a bad angle can significantly heat your machine, causing it to burn up. This hazard can be countered by heat-shielding your machine using armour and some other metal blocks to protect vulnerable parts from burning. Placing these parts on the forward facing parts of your machine means they’ll take on the brunt of the heat during re-entry.
Misc Points
Another area of Besiege that works differently in space is fire. Although it is still possible to create flame outside of an atmosphere, in many instances it’s a lot less reliable and the risk of fire spreading between blocks is significantly reduced.
A classic method of propulsion in Besiege is heating a water cannon with a torch to produce steam, but in space torches are unreliable and don’t provide a constant flame. If you wish to use this propulsion method outside an atmosphere, you’ll need to use a Flamethrower which in turn requires fuel.

Something else to consider when designing your machines for space is that you’ll rarely need to fire in the same direction that your ship is pointing. So placing all your weapons facing forward isn’t always wise and you may wish to create turrets to ensure you can target enemies independently from your ships flight direction.
That’s everything for this post, next week will be the final development post before the expansion’s launch on the 22nd of June and we’ll be taking a look at some of the new levels which make up the space campaign!
We hope you’re as hyped as we are for the release and encourage you to wishlist The Broken Beyond if you haven’t already.
Cheers everyone, Von
[dynamiclink href="https://store.steampowered.com/app/3639470/Besiege_The_Broken_Beyond/"][/dynamiclink]
Previous Development Posts
Post 1 - Simulating Planets & Gravity
Post 2 - Simulating Atmospheres and Trajectory Prediction
Post 3 - Space Blocks
Post 4 - Fuel System & Blocks
Original post
10 Jun 2026Developer post
Community Highlights #10 + Mecha Contest Winners
Hey everyone! Community Highlights is back and we’ve hit double digits. Welcome to our 10th edition! 2026 has already been our busiest year yet. Between announcing The Broken Beyond and preparing for its release, there’s been plenty happening behind the scenes but celebrating the
05 Jun 2026Developer post
Coming June 22nd - The Broken Beyond - Fuel System & Blocks
Hello everyone! The Broken Beyond will be available to buy & play on June 22nd, in just over 2 weeks time! Last week we began showing off 7 of the 13 new blocks that The Broken Beyond expansion contains and this week we’ll be continuing that theme by revealing the final 6, al
29 May 2026Developer post
The Broken Beyond - Space Blocks
Hello Everyone! It’s time for another Broken Beyond development post and this week we’re looking at some of the new blocks coming with the expansion, all designed for space! If you’re excited for The Broken Beyond, wishlist below! Development Post The Broken Beyond brings with it
22 May 2026Developer post
The Broken Beyond - Simulating Atmospheres & Trajectory Prediction
Hello Everyone! Today we’re delighted to share the second in a series of posts which delve into the upcoming Broken Beyond expansion and its exciting new content! If you haven’t already, please consider wishlisting the new expansion as it helps us reach more physics building enth
Hello Everyone!
Today we’re delighted to share the second in a series of posts which delve into the upcoming Broken Beyond expansion and its exciting new content!
If you haven’t already, please consider wishlisting the new expansion as it helps us reach more physics building enthusiasts and will keep you updated about its release.
[dynamiclink href="https://store.steampowered.com/app/3639470/Besiege_The_Broken_Beyond/"][/dynamiclink]
Development Post
Last week we began explaining the fundamentals of space in Besiege, delving into gravitational mechanics and our Newtonian physics simulation. This week we’re going to take a look at The Broken Beyond’s atmospheres and how your machines will interact with them!
With the Broken Beyond expansion, we wanted to capture the stark difference between being in a planetary atmosphere and being in the vacuum of space, both with physics mechanics and beautiful visuals.
Working with talented “shader sorceress”, Freya Holmér, we’ve been able to create stunningly beautiful atmospheres for Besiege’s planets. We wanted them to feel like miniature worlds brimming with character and we’ve only been able to achieve that with her exceptional shader work. Thank you Freya!
Inside planetary atmospheres the physics of aerodynamics is applied to your machine, allowing you to move your machines through the air with propellers, create lift with wings and slow your machine down with drag. This means that for a truly inter-planetary machine, you’ll need a design that functions aerodynamically but can also propel and steer itself in the vacuum of space.
Reaching space requires a powerful machine, capable of escaping a planet’s gravitational pull, but landing in a planet’s atmosphere requires control. You will need to establish a course bringing you to your desired destination, accounting for or utilizing the gravitational influence of planets. It’s also essential that your machine can control its descent into the atmosphere, slowing its descent enough to avoid burning up or crashing into the ground!
This week we also wanted to show you a nifty little trajectory prediction tool that we’ve worked into the expansion. It’s designed to help you determine your machine’s path through space, whether you’re on a collision course, or see whether you’ve managed to establish a stable orbit.
To use the tool, you simply zoom out far enough from your machine and a prediction line will appear, showing where you’ve come from and the path your machine is likely to take (in the final version, your predicted path will be a dashed line).
Different colour lines tell you different things about your trajectory;
A red line indicates that you’re on a collision course with a large object, such as a planet.
An orange line shows that your path is predicted to enter an atmosphere.
A yellow line tells you that your machine has reached escape velocity.
If none of the above are true, the line will be green or turquoise. This likely means you’ve established a stable orbit around a planetary body.
That’s everything for this week, but next week we’ll start showing off the expansion’s new blocks, which constitute the most blocks added by any expansion or update ever!
Until then, please wishlist The Broken Beyond if you haven’t already and help us spread awareness!
Cheers everyone, Von [dynamiclink href="https://store.steampowered.com/app/3639470/Besiege_The_Broken_Beyond/"][/dynamiclink]
Original post
16 May 2026PCGamesN
Destruction sandbox Besiege's new space DLC gets far bigger than anything you've seen before
Besiege: The Broken Beyond is working on a completely new level of scale. The next expansion for one of the most explosively satisfying sandbox games on PC is taking us off world for an adventure among the stars. The introduction of water in The Splintered Sea might have changed
15 May 2026Developer post
The Broken Beyond - Simulating Planets & Gravity
Hello everyone! Today we’re pleased to share with you the first in a series of development posts covering various aspects of the upcoming Broken Beyond expansion for Besiege. We’re also excited to say that we’re still on track to release the expansion in Q2 of this year! Wishlist
26 Feb 2026Developer post
Better Tools Update V1.77 - Multi-key Mapping, Water Tutorials and more...
Hello everyone! Today we’ve got another quality of life update bringing a host of new features and changes for players both new and existing! But before we delve into the details we’d just like to say a big thank you for all the interest and support that’s been shown for Besiege’
10 Feb 2026Rock, Paper, Shotgun
Besiege's next expansion goes where no medieval contraption has ever gone before: space!
More like space the final funtier am I right (cue canned laughter that goes on a touch too long)? Besiege , the physics building game about building all manner of medieval machinery to destroy your enemy, has taken you to all kinds of lands and with its 2024 expansion, The Splint
10 Feb 2026GamingOnLinux
Physics building game Besiege heads into space with The Broken Beyond expansion
Besiege is going to the final frontier with the newly announced The Broken Beyond expansion. Read the full article here:
10 Feb 2026PC Gamer
Medieval physics romp Besiege has spent a decade letting us conquer the land and sea, so naturally its next expansion is heading to the final frontier
Besiege has been knocking around for a while. Hitting Steam early access only a couple of years after the programme started, it quickly became a fave, though it would linger there for five years, only hitting 1.0 in 2020... Read more.
10 Feb 2026Developer post
Besiege: The Broken Beyond - Coming Q2 2026
Today we’re excited to announce The Broken Beyond expansion for Besiege, coming to Steam Q2 of 2026! The expansion takes Besiege’s classic gameplay into space, with a new campaign, a suite of new space themed blocks and a new sandbox environment. Taking Besiege into space has bee
25 Nov 2025Developer post
Nominate Besiege for the Steam Awards 2025!
Hey everyone, It's Awards season again! While most categories celebrate the biggest new releases of the year, there’s one that feels like it was made for games like ours, the “Labor of Love” award. This year marked Besiege’s 10th anniversary . Ten years of building absurd contrap
29 Oct 2025Developer post
Community Highlights #9 + Halloween Contest Winners
Happy Halloween and welcome to Community Highlights IX! 2025 marks ten incredible years of Besiege and what a ride it’s been. Between our major anniversary updates, the launch of Besiege VR , and the upcoming mobile release , the community has continued to blow us away. October a
01 Sep 2025Developer post
Community Highlights #8 + Level Contest Winners
Hey all! Community Highlights is back with our eighth edition! It’s been a busy year between the anniversary updates and the launch of Besiege VR , and the community hasn’t slowed down one bit. This time around, we hosted a Level Contest , and the creativity you all brought to th
26 Jun 2025Developer post
Quality of Life Update V1.75 - Additive Loading, Machine Autosave and more...
Hello everyone! Today we’re excited to bring you a quality of life update for Besiege. We’ve been working with community modder dagriefaa to bring some of Besiege’s most popular mods into the base game, along with a host of other improvements! Additive Loading Additive loading al
27 May 2025Developer post
Community Highlights #7 + Ship Contest Winners
Hey everyone! Ready to dive into another wave of Community Highlights? Our seventh edition has arrived, and it's overflowing with incredible creations from the Besiege community. This month, builders made waves in the Vanilla Boat & Ship Contest , crafting seaworthy machines
01 Apr 2025Developer post
Community Highlights #6 + Tank Contest Winners
Hey everyone! Welcome to another round of Community Highlights. Our sixth edition is here, and it's packed with jaw-dropping creations from brilliant minds in the Besiege community. This month, things got heavy (in the best way possible) as builders rolled into action using only

Updates & announcements

Besiege: The Broken Beyond is out now!

Master Engineer Edition

Share Your Creations

More Information on The Broken Beyond

Balancing Load & Fuel

Steering in Zero Gravity

Atmospheres & Aerodynamics

Misc Points

Marvelous Spectacles

Crafty Contrivances

Moving Tapestries

Besiege: The Broken Beyond is coming June 22nd!

The Fuel System

Development Post

Development Post

Development Post

If you haven’t already, please wishlist the expansion as it really helps us out!

Wishlist The Broken Beyond Now!

Marvelous Spectacles

Crafty Contrivances

Moving Tapestries

Spiderling Developer Community Stream 👻

Marvelous Spectacles

Crafty Contrivances

Moving Tapestries

Spiderling Developer Community Stream

Marvelous Spectacles

Crafty Contrivances

Moving Tapestries

Spiderling Developer Community Stream

Marvelous Spectacles

Crafty Contrivances

Moving Tapestries

Spiderling Developer Community Stream