OFC, this is for 0.9.0 / OA3, like every other SP idea.
Obligatory explanation link.It doesn't involve cards.
Translated to OA, it would be a SP team-based game. The player chooses 4 bots as his allies, bots also display their stats. The maps are distributed in squares. Each map has a gametype, fraglimit and optional timelimit, and starts in 50%. With every win, the winning team scores 10%. A square is been declared as won when it reaches 100%, and lost when it reaches 0%. 0% squares can be replayed in order to get to 100%, but 100% squares can't. The objective is to conquer all the squares in the map. The list of squares might be generated at random with each new game, so players don't play the same game ever and ever again, but maps shouldn't be repeated.
Some ideas about the squares might be:
- mlca1 - Elimination - 5 Rounds - 5 minutes per round
- mlctf1beta - Harvester - 30 skulls - 10 minutes
- kaos2 - Team Deathmatch - 100 frags - 15 minutes
- am_lavaarena - Domination - 100 points - 10 minutes
- oa_shouse - Double Domination - 3 points - 15 minutes
- oasago2 - Capture The Flag - 7 captures - 15 minutes
And so on...
I don't know how the online version of it might be, though.