Deepfable:
Peace Mission

Deepfable: Peace Mission is a pacifist turn-based RPG with action elements and a tone somewhere between Undertale and Idiocracy, made with the Godot game engine.

In the year 2019, four individuals from an alien civilization invaded Earth. Over the course of less than a week, they slaughtered 10% of the human population and razed numerous cities.

15 years later, in the year 2034, the government of the alien civilization sends a diplomat down to Earth. Representing the government, their assignment is to apologize and make amends for the attack.

Unfortunately, you were the only one stupid enough to accept that assignment.