How Compatible Are 0 A.D. Maps Between Versions?

[Perzival12]

Hey, I have some old maps that I would like to port over to A27, but I need to know: what are the requirements for map versions? I know that random maps have code that needs updated, but for Skirmish maps, can I just use the same .pmp and .xml files? Or do I need to completely remake the maps in A27?

Edited November 5, 2025 by Perzival12

[Stan`]

1 hour ago, Perzival12 said:

Hey, I have some old maps that I would like to port over to A27, but I need to know: what are the requirements for map versions? I know that random maps have code that needs updated, but for Skirmish maps, can I just use the same .pmp and .xml files? Or do I need to completely remake the maps in A27?

It depends. Sometimes you'll need xml changes e.g entities being removed. If a terrain was removed you'll need to edit the pmp. Other than this you should be good. There are some scripts to migrate maps from version to version

[Perzival12]

20 hours ago, Stan` said:

If a terrain was removed you'll need to edit the pmp. 

How? In the Scenario Editor? Text Editir doesn’t open .pmp files.

20 hours ago, Stan` said:

There are some scripts to migrate maps from version to version

Where can I find these?

[Stan`]

https://code.wildfiregames.com/P232

And

https://gitea.wildfiregames.com/Stan/pyrogenesis-migration-scripts

[Perzival12]

Is there one to convert A26 to A27 yet? The two scripts are just A25 to A26.

[Stan`]

Nope and neither for R28. I usually did the work when porting hyrule, but i haven't done that in a while