"Roads Not Taken" by Doug Egan.

The game features three significant endings, with some additional variations within each of those.

Player choices become more consequential in the second half of the game. If you wish to reach all of the endings, it may be helpful to SAVE your progress during the flight home from the recruitment visit, prior to the memory introducing Dr. Brinclhof.

In no particular order, the narrator can "Quit", "Finish", or get "Kicked Out" of their research program.

To get kicked out, let eight years pass without reaching either of the other two endings.

To finish requires about 24 cycles of collecting data, 12 cycles of researching and 12 cycles of productive writing.  Writing is unproductive if it hasn’t been preceded by a sufficient count of the other two activities.

There are several different variations of the "finish" ending, depending on what the player chose as their “true ambition” in a much earlier scene introducing Dr. Brinclhof.

To quit, just keep selecting the quit options when they appear. It is possible to lock oneself out of the final quit option if the player remains focused on reaching the "finish" ending instead. Try having some fun. Wander off campus several times. Join people for activities when they ask you to.