... "Training", from Crawford Kilian's /Chronoplane Wars/ series. Training
(always written with an initial capital, even midsentence) allows the
Trainable person to acquire and process information at extremely high
speeds (equivalent of thousands of WPM), with near-eidetic retention.
The TV show Travellers [nothing to do with our game] uses a similar technology. Time travel is accomplished by destructively overwriting the minds of individuals who are about to die [and thus be removed from the timeline] with the uploaded minds of people from the [dystopian post-apocalyptic] future. They come back in teams . . .
. . . one member of which is their Historian. His mind has been filled with massive amounts of information regarding the near future of the moment in time to which their team is sent. Historians also receive updates in a manner similar to Training (above) whenever cumulative meddling changes the timeline.
[Looking back at it - in light of the way time travel is explained in Avengers Endgame - what these teams are actually doing is really creating a spreading series of alternate universes, not actually altering their own pasts. Somehow no matter what they try, the future that's communicating with them only gets worse, rather than better.]