TL;DR
If you write the code yourself, building a Roblox game costs nothing but time — Studio is free, publishing is free, and the platform takes its cut from what you earn rather than what you spend.
AI tooling changes that into a real monthly number. Roughly: $0 if you stay on Roblox's built-in Assistant, $12–19/mo for a Studio-native plugin, $20/mo for a general LLM subscription you copy-paste from, and $20–60 one-off if you buy 3D mesh generation credits. The interesting question is not the price, it is what you get per unit of spend — and that depends almost entirely on how much of your time goes into wiring rather than deciding.
The floor: zero
Worth stating clearly because a lot of "cost of Roblox development" content skips it. Roblox Studio is free. Publishing is free. Testing is free. There is no build fee, no seat licence, no store listing charge.
The platform monetises through revenue share on what your game earns, not through what you spend making it. So every number below is optional spend to go faster, not a cost of entry. A first game built entirely by hand with free models costs zero dollars.
What the tools cost
Roblox Assistant — $0
Built into Studio. For learning Luau and answering "which service owns this", it is the correct starting point and the price is unbeatable. Most people do not need to spend anything beyond this until they are shipping regularly.
A general LLM subscription — around $20/mo
ChatGPT, Claude or Copilot in a browser tab. Fine for isolated snippets and for reasoning about design. The cost that does not appear on the invoice is the copy-paste loop: you are the integration layer, and a general model does not know your place hierarchy, so it produces code that has to be adapted before it runs.
There is also a dialect tax. Generic models tend to produce vanilla Lua patterns that break in Roblox — the task library, continue, generalised iteration and strict-mode annotations all differ, and the failures are quiet.
A Studio-native plugin — $12–19/mo
This is the category Picoo is in. Picoo is $19/mo, or $12/mo billed yearly, for 200 credits a month; the Business tier is $49/mo ($35 yearly) for 500 credits and team seats. Competing plugins sit in a similar range.
What a credit buys, concretely: most single-system builds are one credit. A damage system, a coin system, a lighting preset — one prompt, one credit, a couple of files. Larger multi-system builds cost more because they are several generations under the hood. In practice a 200-credit month is a lot of building for one person; the users who run out are the ones iterating hard on a single game daily.
3D mesh generation — $0–60, usually one-off
Text-to-mesh tools price per generation or in credit packs. This is genuinely optional: free models and the Toolbox cover a lot, and most first games never need custom meshes. If you do buy, buy in bursts when you need assets, not as a standing subscription.
Where the money actually goes on a first game
The naive budget assumes cost scales with game size. It does not. It scales with iteration — how many times you rebuild the same system because the first version was not right.
A realistic first-game shape, from what we see in usage:
- Systems you build once — saving, leaderboards, shop, damage. Cheap. A handful of credits total.
- UI — the most-requested category by a wide margin, and the one people redo most. This is where credits go.
- The map — terrain and layout, second-most requested. Also heavily iterated.
- Polish — lighting, sound, particles. Cheap per attempt, but attempted many times because it is judged by feel.
If you want to spend less: decide before you generate. The single biggest waste is prompting for a system you have not thought through, then regenerating it three times. That is not an AI problem; it is the same cost you would pay in hours if you were writing it yourself, just visible now because it has a number attached.
When paying stops making sense
Be honest with yourself about which of these you are:
Do not pay if you are learning Luau. Assistant is free and better for that — it explains, which is what you need, rather than producing code you cannot yet evaluate.
Do not pay if you build one game slowly, for fun, with no deadline. The value of paid tooling is time, and if time is not scarce for you the maths does not work.
Do not pay if you expect it to design the game. Every tool in this article writes systems. None of them know whether your game should have pets, and buying one hoping it will decide is money spent on the wrong problem.
Paying is defensible when you can name the hours you lose to assembly rather than to thinking — wiring remotes, matching names across five files, rebuilding UI panels. At $19/mo, the break-even is roughly one saved hour a month. Most people who ship regularly clear that in a week.
A note on our own pricing
Picoo has no free tier. That is deliberate, and it has a cost we accept: people cannot try it before paying. We would rather be straightforward about who should not buy it — see the section above, it is not marketing copy — than run a free tier that makes the product worse for the people who do pay.
Credits do not expire, and top-up packs exist for months where you build more than usual.
FAQ
How much does it cost to make a Roblox game?
Zero, in the literal sense — Studio, testing and publishing are all free, and Roblox earns from revenue share rather than from developer spend. Everything else in this article is optional spend to move faster.
Is a paid Roblox AI plugin worth it?
It depends entirely on whether your bottleneck is knowledge or assembly. If you are still learning how Roblox works, a free assistant serves you better. If you know what to build and lose your evenings to wiring it together, a plugin is cheap for what it removes.
What is a credit?
A unit of generation. On Picoo, most single-system builds are one credit; larger multi-system builds cost more. 200 credits a month is a lot of building for one developer working on one game.
Can I build a Roblox game entirely with AI?
You can get a long way, and you should expect to review everything that touches the client/server boundary. The failures that survive AI generation are almost always trust failures — health written on the client, currency added from a remote that accepts any number — and they look like working code until a second player joins.
Is there a free trial?
No. Picoo is premium-only. If that is a dealbreaker, Roblox Assistant is free and genuinely good, and we would rather say so than take money from someone the tool does not fit.
See what you would be buying
Every system in the how-to library documents what gets generated — file list, line counts, real Luau, and the design decisions behind each one. Read a few before deciding whether the monthly number is worth it: damage system, shop system, DataStore saving.