I have not been on this site in several years. I have posted almost 10 games, and I'm not sure how to find them in the arcade. Did they do a game clean up? Are my games lost for good?
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When you're on the arcade homepage, there's a tab with options on the left. If you scroll down there is an option that says "My Games." Maybe try looking there. I have a game that's six years old and it's still there.