Alien Function

For many years, Typhil has been working as a dirt regulator aboard this starship. After a series of strange occurrences, it becomes clear there is more to the ship than meets the eye. And Typhil himself may not be who he thinks he is.

Typhil and his companions set out to unravel the many mysteries of this enigmatic starship, facing aliens, killer robots, and more on a quest for the truth about their mission, and their lives.

* A compelling mystery full of suspense and dark humor. * Traditional adventure game puzzles as well other more unique types of puzzles * Fully voiced by professional (and awesome) voice actors * 3rd person point and click gameplay * Functional Operating System simulator

While a stand-alone game in its own right, this game continues the over-arching story from the previous three games in the series:
https://store.steampowered.com/app/813250/Unicorn_Dungeon/
https://store.steampowered.com/app/912500/Poltergeist_Treasure/
https://store.steampowered.com/app/966730/Leprechaun_Shadow/

Also, see the sequel:
https://store.steampowered.com/app/1596080/Vagabond_Starship/

Source: Steam Store Description