I felt like questions along the line of "can I downgrade UE5 project to UE4" is popping up frequent enough to warrant a FAQ.
#[FAQ] Downgrading project to earlier version
royal canopy
soft viper
Answer: No
pulsar widget
The answer should be longer if possible, explaining why it is not possible to downgrade.
soft viper
UE5 is very different from ue4, they changed everything from the physics to the water system, they didnt even bother trying to make it possible to downgrade to ue4, everything will corrupt if you do so, even if you try to copy a snippet of blueprints from ue5 to ue4, half of them will disappear, they simply did not add the support.
The serialized representation of most everything completely changed in ue5
royal canopy
UE5 is very different from ue4, they changed everything from the physics to the ...
Except you can't also downgrade between UE4 versions.
soft viper
yeah I don't think they bother adding downgrade support between any versions
just upgrades
ebon sluice
weak remnant
most (not all but most) of the time it's better to be running on a newer version anyways I don't see any reasonable reason to go backwards
soft viper
when u need an asset ig
pulsar widget
most (not all but most) of the time it's better to be running on a newer version...
Some undiscovered, game breaking engine bug would be fair
That's sadly pretty common
Especially in bigger titles. Not everything can be tested for when upgrading engine. And not everything instantly has a cherry pickable fix. But sadly doesn't change that one can't downgrade