It's not RBI. Why? Because RBI was never released for the PC10 regardless of what you've read. The only way RBI is in a PC10 cab is if someone hacked a NES cart in there....
Maybe not, Frizz. There is a PC-10 flyer that I believe is titled "Summer of fun", that shows RBI Baseball being released, summer of '87. It credits it as 1987 Atari Games. Granted, promo flyers usually promote games that are still in production, that never make it to the field. There is another PC-10 flyer showing Goonies 2, Ghost and Goblins, and Kid Icarus, "COMING SOON!" Alas, we all know that didnt happen!
However, this falls in line with my discovery of an actual PC-10 RBI label, I had on my SMB 3 cart. The label was peeling and I saw that the cart had been changed from it's original state of RBI to SMB 2, then SMB 3. I was stunned. I actually shared this with Thombleson and Pete from PAR. So, IMO, I can say that they were at least in production.
However, I cannot say that NG 3 was. No one has ever confirmed this, except for Dorschel. I believe he is the only one, I've ever heard, of owning this. I believe this is the "coin-box" story, that is too sad to repeat!
