Risk of Rain 2 is a pretty popular game. Since it is Singleplayer and Coop, it should be easier to read the variables needed for game specific events like Boss kills and teleport charging. One could also use the "capture full match" feature to capture a full run and have a tidy collection of runs.
Additional game events could be "finding a legendary item", "leaving the stage" and "player deaths" (both your own and your allies)