I could be completely wrong, but I think one of the first anomaly detection games was called “I’m on observation duty” which came out in 2018, but didn’t really get popular until late 2021 (when the fourth game in the series same out), about the same time “The exit 8” released funny enough.
That game is a little different where the player flips around security cameras and reports anomalies as they come up, but I think exit 8 was the first anomaly detection games that is “looping” and you have to decide whether to go forward or back depending on if there’s an anomaly
The scout’s voice actor (Nathan Vetterlein) used to be super active, but a few years ago he said he’d be going on an “indefinite break” while he focused on other goals he had in life (presumably to do more than just be the “TF2 scout guy”).
His linked in currently says he’s working as a principle game designer at Wizards of the Coast
You might be interested in inworld.ai/origins , a detective game where all the characters can be interviewed in natural language and respond with AI. They seem to be doing a pretty good job so far