Spiderling’s next Besiege expansion trades oceans for orbits, pushing its physics sandbox into space with zero‑G contraptions, gravity‑bending missions, and big implications for long‑term support and mods on PC and console.
Besiege has always been about taking fragile-looking piles of wood and steel and turning them into engines of absurd destruction. 2024’s The Splintered Sea expansion proved there was still life in that formula by throwing buoyancy, waves, and storms into the mix. Now Spiderling Studios is going further, literally, with The Broken Beyond: a full space expansion that asks a very specific question.
What does it mean to build a siege engine when there is no “down” any more?
From crashing catapults to controlled orbits
The Broken Beyond’s pitch, across its Steam page, Q2 2026 announcement and the first teaser trailer, is clear. This is still Besiege, not a hardcore orbital sim, but gravity is no longer a simple on/off switch. The new campaign takes place across multiple planets and orbital arenas where you:
Navigate shifting gravitational fields instead of flat, predictable terrain.
Thread machines through asteroid clusters that behave like moving obstacles rather than static walls.
Pilot improvised spacecraft against alien forces that shoot back with their own machines.
The key is that all of this still runs on Besiege’s physical construction model. You are bolting blocks together, exposing structural weaknesses, and then watching it all wobble the moment you tap the throttle. Where The Splintered Sea let you discover how badly your favorite land tank handled buoyancy and drag, The Broken Beyond is going to expose every asymmetry the moment you leave a planet’s surface.
Zero‑G contraptions: rockets, reaction rigs and rotational chaos
The trailer and store description hint at a few broad categories of builds that are going to matter in space.
The first are straight-line launch vehicles: rockets, multi-stage boosters, and chunky medieval space buses bristling with thrusters. The footage shows ships clawing their way out of gravity wells, which implies thrust-to-mass ratios will matter a lot more than on land. Players that previously overbuilt for armor and spikes will need to trade some of that mass for propulsion or risk never clearing the atmosphere.
The second category looks more like orbital tugs and maneuvering craft. The teaser emphasizes “mastering space flight” and “navigating gravitational fields,” which only makes sense if you can reorient and correct in every axis. That almost certainly means new blocks dedicated to fine control: small gimbal thrusters, attitude jets, maybe dedicated gyro elements to fight unwanted spin. In low‑G, a slightly off-center engine cluster no longer just pulls you to one side, it sends your whole machine into a slow, unrecoverable tumble.
Then there are the weapons platforms. Besiege has always been happiest when something explodes, and The Broken Beyond does not look interested in changing that. Alien spacecraft give you moving targets rather than static castles, and the marketing copy talks openly about obliterating ships, armies, and even worlds. Expect players to build spinning flak rings that throw projectiles in all directions, guided missile racks that rely on new tracking logic, and “gravity bombs” that exploit planetary pull to curve shots onto targets.
Part of the fun will be how familiar tools get weird in low‑G. Cannons provide recoil that doubles as accidental thrust. Spinning saw arrays produce torque that starts turning the entire ship. Even decorative blocks might become practical if they can be sacrificed as improvised ablative armor against asteroid impacts.
Mission design in a world without a floor
Each Besiege expansion to date has been as much about level structure as new blocks, and The Broken Beyond appears to follow that pattern.
Where The Splintered Sea built its 10+ oceanic missions (eventually expanded to 15) around water management, the space campaign looks designed as a tour of different gravitational toys. Some levels seem set on small planetoids where you fight under weak, jumpy gravity. Others are proper orbital arenas, where a single burst of thrust might send debris, enemies, or even your objective drifting off into the void.
This shift changes the classic Besiege problem-solving loop. On land you think in terms of approach vectors and ground clearance. In water you worry about buoyancy, ballast, and waves. In space, objectives are likely to revolve around:
Escorting fragile payloads through asteroid belts without letting collisions spin them out of control.
Chasing and disabling mobile capital ships instead of just toppling walls.
Timing burns to slingshot around small moons or artificial gravity wells.
Physics puzzles should grow more systemic and less scripted as a result. Knock something loose and the game no longer quietly resets it to a spawn point; it keeps drifting until some other force acts on it. That opens the door to missions where failure or success is about how you manage the entire field of motion, not just brute-forcing the target with spikes and fire.
Building on The Splintered Sea’s lessons
The Splintered Sea was more than a themed level pack. It introduced water as a fully simulated layer that interacted with every existing part, from wheels to bombs. It also shipped with a sandbox environment that quickly became a new default test bed for builders.
The Broken Beyond looks like a direct continuation of that philosophy. Spiderling did not create one or two specific underwater missions with bespoke logic; they added water physics to the entire game. In the same way, this space expansion comes with a new sandbox and what they are already calling “new physics mechanics,” not just some low-gravity toggles in the options.
If Splintered Sea was about testing propulsion, drag, and stability against a continuous medium, Broken Beyond is about seeing what happens when you take that medium away. Features like buoyancy and wave forces give way to inertia and orbital dynamics. That is a big shift for contraption design. Machines that survived rough seas because they were wide and low may be completely unusable when there is no friction to keep them pinned down.
Importantly, Splintered Sea also proved that Spiderling could deliver post-launch pay DLC without starving the base game of updates. The studio was explicit at the time that expansions would fund continued free improvements, and they followed through with tweaks and additions that benefitted everyone. The Broken Beyond’s reveal, coming just two years later with another full campaign, suggests that cadence was not a one-off.
Long-term support and what it means for PC and console
Between the 1.0 release, years of free updates, a full ocean expansion, and now a space campaign planned for Q2 2026, Besiege is starting to look less like a one-and-done indie and more like a long-tail platform. The Broken Beyond’s announcement stresses that it is aimed at players who already have deep experience with the game, which is another way of saying Spiderling expects you to still be around.
For PC players that is good news for both official and community content. New block types and physics systems invariably end up as tools that veteran builders fold into their workshop designs. Zero‑G thrusters, gravity manipulators, or structural parts optimized for lightness will all become standard ingredients in challenge levels and custom campaigns long after the DLC launches.
Console players stand to benefit too. Besiege’s console versions already support community creations in a curated form, and each expansion to date has made its way onto those platforms. A space-themed campaign offers ready-made test cases for performance and control tweaks on gamepads, both of which are likely to filter back into the broader codebase. If Spiderling continues its pattern, parity updates should eventually bring space mechanics into console sandboxes as well, even if store-level mod integration stays more restricted than on PC.
The key takeaway is that expansions are being treated as mechanical evolutions rather than isolated side stories. Oceans changed how every old machine behaved. Space will almost certainly do the same.
A new frontier for Besiege’s modders
Besiege already has a mod scene that punches above its weight, especially on PC where Steam Workshop builds range from functional calculators to transforming mechs. Every time the developers extend the physics model, those creations get stranger and more ambitious.
Broken Beyond looks tailor-made for that kind of experimentation. Once low‑G and orbital arenas exist as official rulesets, it will be straightforward for modders to design:
Custom space biomes that combine terrain, vacuum and maybe even thin-atmosphere pockets in a single level.
Scripted encounters that lean on new block behaviors, such as gravity generators or advanced sensors.
Entire pseudo-games inside Besiege, from capture-the-flag satellite duels to multi-stage missions where one failed burn has cascading consequences.
The trailer’s promise of a “suite of new space-themed blocks” is especially important here. Historically, Spiderling’s blocks have been intentionally generic, letting the community turn them into everything from helicopters to walking tanks. In space, a few flexible thrust and control components could underpin everything from authentic multi-stage rockets to comedy UFOs held together by braces and hope.
Even players who never touch mods will feel the impact in shared creations. Expect the workshop to fill up quickly with orbital dogfights, asteroid obstacle courses, and gravity-based puzzle levels that ride on the back of Broken Beyond’s new systems.
Medieval junk in the final frontier
One thing The Broken Beyond does not change is Besiege’s tone. The marketing shots are full of rickety wooden fuselages strapped to engines they have no business carrying, ragdoll soldiers and aliens flinging themselves through vacuum, and explosions that feel as much slapstick as they do tactical.
That anachronism is part of why this expansion makes sense. Besiege has always been slightly ridiculous, and putting trebuchets into orbit simply leans into the joke while giving the physics engine more room to flex. The more earnest the gravity puzzles become, the funnier it is when your beautifully tuned rocket disintegrates because you forgot to brace a single plank.
So while The Splintered Sea proved Besiege could survive the transition from land to water, The Broken Beyond looks ready to test whether its mix of precision engineering and chaotic failure works when there is nothing to stand on at all. If Spiderling delivers on the promise of a fully supported space sandbox, this could be the expansion that turns Besiege from a medieval curiosity into a long-term physics playground across PC and consoles alike.