Problem will likely be that there's trademarked brands on the Rollergames playfield. I wouldn't hold your breath waiting for that.
Please consider Embryon! You’re already doing Space Invaders and Future Spa. Seems like it would make sense and the demand is definitely there!
Have you considered, Silver Ball Mania ? By game design itself its a guaranteed worn field on everyone ever made.
I’d go for a Mr & Mrs Pac Man. I know people don’t care for the game but I think the theme makes it collectible and worth restoring.
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