InnerSpace

InnerSpace is an exploration flying game developed by PolyKnight Games and published by Aspyr. Funded through Kickstarter, it was released on 16 January 2018 for Windows, macOS, Linux, PlayStation 4, Xbox One and Nintendo Switch, as Wikipedia notes.

The setting is the Inverse, a dying realm of inside out planets where gravity pulls outward. Together with a character called the Archaeologist you fly through open skies and dive into oceans to recover relics and memories of extinct civilizations. Along the way you unlock new aircraft with different abilities, while ancient demigods still roam the world. The game has no focus on combat and leans on its art style and electronic soundtrack, according to the Steam page. Reviews were mixed, with Metacritic scores in the mid 60s.