AER - Memories of Old, a beautiful Low-Poly-Exploration-Adventure, in which you can transform into a bird at will to explore the world, is now available for Linux on GOG and Steam!

Update: the game needs

-screen-fullscreen 0

for me as startup-option in the Steam-Client.

Description:

The gods of old are forgotten, lost in the events that shattered the world, leaving only fragments of islands in the sky. This mystic world of endless skies, colorful islands and ancient ruins is in danger of falling into darkness. As one of the last few shapeshifters, you are sent on a pilgrimage to the Land of Gods. Uncover the secrets that will help save reality itself.

Key Features

Fly and explore by transforming into a bird at will
A large open world of hidden secrets and new discoveries
A pilgrimage of mysteries, puzzles and temples
Strong focus on atmosphere and aesthetics with a vibrant minimalisitic art style