Epic's engine and content terms

Unreal Engine EULA: selling code built on Unreal

Updated 2026-10-28

Epic leaves your own work with you and keeps tight hold of everything it licensed to you. That split decides what an Unreal studio can sell.

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What you own

As between you and Epic, you own all rights in the products you develop under the agreement, other than rights in the licensed technology. Fab says the same of anything you make with its content.

Source: Engine and middleware terms on a studio's code

Who may receive engine code

You may distribute engine code, modified or not, in source or object code only to a third party separately licensed by Epic for the same version. A buyer without an Unreal licence cannot take the engine half of your repository.

Source: What engine licences let leave a studio

The generative AI bar

The EULA bars any use that results in the licensed technology becoming a training input to a generative AI program, and the content EULA bars putting NoAI content into datasets for such programs. Fab carries the same NoAI rule under a standard licence.

Source: What engine licences let leave a studio

Whether the code you wrote is protected at all is on is game code copyrighted.

Tell us what the repositories hold

Tell us the engine, the middleware and where the assets came from, and we will check them against the 20 licence documents on this board in a written reply.

The code

What is in the repositories?

What engine is the code written against?

Our reply

Your name

Work email

Engineers and staff employed today

Add more detail (optional)

Optional, but it helps us answer fully first time.

Does the code call licensed middleware or console SDKs?

Has the studio licensed its code or data before?

Our data is our product (we already license or sell it) Once or twice Not before now

Who holds a licence to the code now?

Has a buyer offered for the code already?

Yes, there is an offer No offer so far

What is happening at the studio?

Annual revenue, roughly, in dollars or pounds

How many years of commit history do you have?

Language of the code comments and commit messages

When could the repositories be reviewed?

Country the studio is registered in

Your role, for example CTO or studio head

Anything about the publisher contract, bought assets or engine licence?

Details

Also send me occasional emails from sellgamesourcecode.com, run by Sell Game Source Code: new data and guides on the subject this site covers, and tools and offers from Sell Game Source Code for people working in this area. I confirm by email first, and every email has a one-click unsubscribe.

A person reads each source code enquiry
No engine maker or buyer here sees what you send
No code, keys or repository access is asked for

Find out which parts of your code you can license

Tell us the engine, the middleware and where the assets came from, and we will check them against the 20 licence documents on this board in a written reply.

Ask about my game code

Sources

This site's own datasets, every figure quoted from its source and dated:

The law on copyright in a game's code: 10 US and UK rules on copyright in a game's source code, read 28 October 2026.
What a game's source tree lets a seller pass on: 7 of 19 engine, middleware and asset store licences we read let their code or content leave a studio only compiled into the shipped game, read 28 October 2026.
Game middleware software data terms: 0 of 19 game middleware software vendors whose terms we read reserve the right to use their customers' data in aggregated or anonymised form, read 28 October 2026.
Who takes a game's source code: 3 of 14 organisations and marketplaces whose pages we read take a game's code without taking ownership of it, read 28 October 2026.

No.	Source	Published by
[1]	Unreal Engine EULA	unrealengine.com
[2]	Unreal Engine content EULA	unrealengine.com
[3]	Unity Editor Software Terms	unity.com
[4]	Unity Package Distribution License	unity.com
[5]	Unity Asset Store Terms of Service and EULA	unity.com
[6]	Fab EULA	fab.com
[7]	CRYENGINE Terms of Service	cryengine.com
[8]	O3DE licence (Apache 2.0)	github.com

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