If an AI tool generates a game "on top of" an engine, which engine that is still matters, even if you never see it. Here's what actually changes.
Licensing is the first fork in the road
Godot is MIT-licensed, free, with no revenue threshold and no per-seat cost, ever. Unity's licensing has changed multiple times in recent years, runtime fees, seat tiers, and while current terms are more predictable than the 2023 controversy that damaged trust broadly, the willingness to change terms after the fact is now part of Unity's reputation whether that's fair or not. For a tool promising a permanent, locked-in rate to its users, building on an engine with a history of changing its own rules is a real risk to inherit.
Export friction, concretely
Godot exports natively to Windows, macOS, Linux, and mobile without per-platform licensing gates. Unity's export story is broader in some niches, console support in particular, but comes with more account and licensing overhead per target. For a tool whose whole pitch is "click export, get a store-ready build," fewer gates between generation and a working file is a real product advantage, not just a philosophical one.
What you actually own
A Godot project is a folder of text and resource files you can open, read, and move, with nothing phoning home to check a license. That matters specifically for the "no lock-in" promise a lot of AI game tools make: the promise is only as real as the engine underneath honoring it. An engine that requires an account, a license check, or a subscription to keep working undermines that promise structurally, no matter what the marketing copy says.
Where Unity still wins
3D-heavy projects, console deals, and studios that already have Unity expertise on staff. If an AI tool is specifically targeting 3D or console, Unity's maturity there is real and Godot is still catching up. For 2D, which is where most AI-generated games live today anyway, the gap is much smaller.
The question worth asking about any AI game tool
Not "what engine does it use," but "what does that engine choice cost me later." Godot's answer is close to nothing. Unity's answer has changed before and could change again. Neither is wrong to build on, but only one of them makes a permanent promise easy to keep.