Outer Wilds had so many profound moments, imho. Just listing a couple more:
Spoilers, obviously
- The core of the interloper
- The dead Nomai in Dark Bramble (two of them in an embrace, iirc)
- The messages from other Nomai tribes in the Vessel
- Having to remove the warp core from the ATP
- The number of loop iterations in the probe tracking module
- The ending of the DLC
It's based on Firefox, but those modifications do have a rather large impact in terms of privacy.