Threes is the adorable, addictive puzzler from Greg Wohlwend and Asher Vollmer, neither of whom are robots. Team Colorblind is the studio behind Aztez, the bloody beat-em-up in development for next-gen platforms and Steam, and no one in that group is a robot, either.
Threesus, also known as Threepio, is a robot, and it's playing Threes live on game broadcasting platform Twitch right now - and it's doing a really good job. Matthew Wegner, one half of Team Colorblind, designed the robot playing Threes, while Way designer Walt Destler programmed the AI's logic.
We enjoy Threes very much, but we've never reached the ridiculous numbers this robot can. A lot of other people haven't, either: Less than half of players have seen the tile 384, but Threepio has made it to the thousands. So far.