Engine guide
Unreal Engine, Unity, Godot and GameMaker cover the overwhelming majority of small-team PC development — and each one has a condition under which it is the wrong choice. This guide walks all four in the order most teams actually evaluate them.
Bench note — three constraints written before any table
The engine question is downstream of three constraints: scope, art pipeline, and shipping platform. Scope means the smallest game the team would be proud to sell, not the pitch document. Art pipeline means whether the game is 2D sprite work, stylised 3D, or something in between — and who is producing it. Shipping platform means desktop Steam first, and then whether Steam Deck, consoles, or mobile are in the plan.
Write those three down before opening a comparison table, because they eliminate engines faster than any benchmark does. A two-person team building a pixel-art roguelike and a six-person team building a systemic 3D RPG have almost nothing to learn from each other's engine thread on a forum. That is why generic "best engine" answers stay generic.
Four stations, one rail
This is not a feature checklist. Feature lists are enormous and mostly irrelevant to the decision in front of you. What matters is which tool lets your team build the smallest version of this game without the pipeline becoming the project.
Station 01 / 3D-first
High-end 3D and stylised 3D at mid scope. Blueprints let designers build gameplay without waiting on engineers; the cost is weight, build times and discipline about what the project never uses.
Rewards — parallel design & code
Wrong choice for — 2D-first projects
Station 02 / Breadth
Range. 2D and 3D, a plugin ecosystem that covers most problems you will hit, and an unusually large published record of tutorials, postmortems and open-source examples. The UK's widest hiring pool too.
Rewards — ecosystem & hiring depth
Wrong choice when — architecture has no owner
Station 03 / Lightweight
Small install, fast editor, no licensing or platform strings attached. The scene-and-node model is quick to reason about once it clicks, and the source is readable when something behaves unexpectedly.
Rewards — open-source terms & speed
Wrong choice when — large 3D production
Station 04 / Fast 2D
Fast 2D iteration with a real commercial track record. The workflow compresses the distance between an idea and a playable, which is the whole game for a two-person arcade, platformer or retro-inspired PC title.
Rewards — idea-to-playable speed
Wrong choice for — systemic 3D RPGs
Unreal rewards teams who need modern 3D rendering, a deep materials and lighting pipeline, and a workflow where designers can build gameplay without waiting on engineers. Blueprints are the reason many small studios choose it — systems move forward in parallel with code.
The cost is weight. Unreal projects grow large quickly, build times are real, and a small team has to be disciplined about what it does not use. A two-person studio that needs a flat 2D presentation should not be paying the Unreal tax. Unreal is the default answer for high-fidelity 3D and defensible for stylised 3D at mid scope. It is rarely the right answer for a 2D-first project.
Unity's strength is range: 2D and 3D, desktop and other platforms, a plugin ecosystem that covers most problems you will hit, and an unusually large volume of tutorials, postmortems and open-source examples to learn from. When you hit a wall at 2am, someone has written about that wall.
Unity also has the widest hiring pool in the UK, which matters when a team scales up for a few months near launch. The trade-off is that breadth cuts both ways. Unity will let you start badly in more directions than any other engine on this list. Projects drift when nobody owns the architecture, and Unity does not push back.
Godot suits teams who want a small install, a fast editor, and no licensing or platform strings attached. It is a genuinely capable option for 2D and for stylised 3D at modest scope, and the scene-and-node model is quick to reason about once it clicks. For UK indie teams who care about open-source terms and want to read the source when something behaves unexpectedly, it removes a category of anxiety.
Be honest about the trade-offs: the asset and plugin ecosystem is smaller than Unity's, and the published record of shipped commercial 3D PC games is thinner. For 2D or modest 3D, neither usually decides it. For a large 3D production, they can.
GameMaker remains strongly associated with 2D games and fast prototyping, and it still shows up in current engine roundups as a practical option for smaller commercial projects. It is regularly positioned as easier for rapid iteration than heavier 3D-first engines — exactly what a two-person arcade, platformer or retro-inspired PC game needs.
The workflow compresses the distance between an idea and a playable, which is the whole game for small teams. If the game is 2D-first and the team is small, GameMaker belongs on the shortlist even if it is not the fashionable answer. It is not the tool for a systemic 3D RPG.
The decision in practice
Write the game's core loop in two sentences. Name the art style. Name the first platform and the second. Now check which of the four engines has a shipped, comparable game from a team of similar size. That is your shortlist, usually two engines.
Build the same tiny prototype in both if you can afford three days. The engine that lets you answer the prototype question faster is the one to commit to. Committing matters more than optimising the choice — every month spent re-deciding is a month the vertical slice is not being built.
Vertical slice — honest estimate
4 open items
Step one
One level, or one run. Not a slice of a slice.
Step two
Final-quality art in the slice — the pipeline this proves is the one you will run for the whole game.
Step three
A real menu, real audio, and a stranger who can pick it up and play it.
Step four
Estimate the weeks honestly. If the estimate does not fit the schedule you have, the answer is not to change engines. It is to narrow the game.
Before you close the decision, write the vertical slice in one paragraph — one level or one run, final-quality art, a real menu, real audio, playable by someone who has never seen it. Then estimate the weeks honestly.
No engine makes a too-large game small. If the estimate does not fit the schedule you have, narrow the game — do not swap the engine hoping the schedule follows.
Check the store page assets list against the art pipeline. If the team cannot produce a capsule and a trailer from the chosen engine's output, that is a conversation to have now and not three weeks before launch.
The capsule is one image and one crop. The trailer is the slice you already built. If neither is exportable from the engine, the pipeline is the problem — not the marketing.
Platform reach as a tie-breaker
If two engines are genuinely close on the prototype test, platform reach decides it. Steam Deck compatibility is the first thing to check, then whether the game might eventually need consoles, then whether a mobile or web version is plausible. The engine with the smoother path to the platforms you actually intend to ship on wins the tie. Everything else is a preference dressed as a requirement.
Reach rail
Tie-breaker order, left to right
We do not recommend one engine to every team. The recommendation is always the same shape — the engine that lets your team ship the game you described, on the platforms you named, without the pipeline becoming the project.
Once chosen, the engine touches everything: the art pipeline, the build and test setup, the people you can hire, the plugins you can buy, the platform support you inherit. Switching engines after the vertical slice is usually a restart, not a migration — so the choice deserves the three days of comparison and not the three months of second-guessing.
In practice, teams who commit early and hold the line ship more often than teams who keep an eye on the other tab. The one legitimate reason to switch is a proof that the chosen engine cannot deliver the core loop. That is a prototype question, and it is why the prototype exists.
Follow stable
Good for a fresh project with no shipped history — you inherit bug fixes and the newest pipeline features. You also inherit the risk of a mid-production break.
Pin the version
The safer choice for a project already past the slice milestone. Document why the version is pinned and revisit at the next milestone — not mid-boss-fight.
Either way
Every plugin is a small commitment too. What is not defensible is upgrading mid-production because a feature looked interesting in a blog post.
The shortlist
You do not need a full benchmark to choose. You need a shortlist. Follow the pipeline in order and let each stage do its one job — every month spent re-deciding is a month the slice is not built.
Step one
Write the loop
Two sentences. The smallest saleable version of this game.
Step two
Build the slice
Same slice in both engines, three days if the team can afford it.
Step three
Commit and hold
Watch the deck check, not the other tab.
Keep going
The rest of the workshop covers the pipeline around the choice: prototyping the slice before art is locked, planning the Steam storefront launch, and checking your game against Steam Deck targets. If your shortlist is still open, that is the right moment to talk.
Where to go next
