Long-time lurker that's finally had something resembling an idea for an SCP. Long story short, it's a copy of a sports video game that, when the franchise mode (for those unfamiliar with sports video games, a mode where you can play through multiple consecutive seasons, usually as a General Manager or team owner) is simulated turns out to accurately predict the results of the simulated seasons.
I was initially thinking of it simulating just the schedules, scores and playoff results. On further reflection (and this could be developed in test logs and the like), I'm now considering that the depth of the result accuracy could be dependent on the difficulty level chosen when the franchise mode is booted up. For example (Hockey examples given since it's the sport I'm most familiar with):
Easy: Scores, Schedules and playoff results
Medium: Player transactions (trades, free agency). Scoring will be accurate to the game's real life counterparts
Hard: Minute stats like time-on-ice, blocked shots and hits would be accurate to real-life counterparts
Expert: Player injuries (extent, severity and time lost), careers of players drafted (names would be different since most sports games randomly generate rookie names after a couple years of Franchise mode) would be accurate to their real-life draft analogue (ie: the player simulated to have been drafted first overall in 2012 would follow the same career trajectory as Nail Yakupov of the Edmonton Oilers)
All the rest of this (containment procedure, discovery details, other things like gaming system, version of the game etc.) is just kicking around in my brain for the moment. I just wanted to get the idea out there to solicit feedback and see if it's something worth pursuing.