Raid Ponzi Steemit lets you have a round of RPS on the Steem blockchain. You visit https://spelmakare.se/steem/rps to make, or respond, to a challenge. The RPS round is posted as comments to the blockchain. Think someone is wrong with their latest blog post? Challenge you them to have the dispute settled!
New in 1.0
The only change in the final release was to remove the usage of private post key and instead rely on Steem Connect signed links. Safer for the user and no worries for me having a site asking for private post keys.
Site & Source
Game site https://spelmakare.se/steem/rps
GitHub https://github.com/smjnab/SteemRPS
Steem Projects https://steemprojects.com/projects/p/raid-ponzi-steemit/