OpenRA

I wonder if OpenRA supports legacy MPR maps and/or expend*.mix mods.

Graphics: yes
RULES.INI: no

so you need to port them, but this is not much work. #openra on FreeNode IRC can help you live.

Cmd. Matt wrote: ↑Graphics: yes
RULES.INI: no

so you need to port them, but this is not much work. #openra on FreeNode IRC can help you live.

what about MPR maps?
It would be to to be directly playable (or be converted on the fly)

roytam1 wrote: ↑what about MPR maps?
It would be to to be directly playable (or be converted on the fly)

You can convert both the MPR and INI format legacy maps with the editor. Apparently it's planned to be part of the main game engine itself eventually, which might entail some form of direct support for/conversion of the original formats without messing around manually at some point.

Nope. The idea is to get rid of WinForms and use the OpenRA widgets and renderer instead of something redundant and broken for map editing. I doubt INI support will come back. They wanted nesting and went for MiniYAML. A conversion step will always be necessary.