AER is the story of a young pilgrim adventuring on a quest to reunite the fragments of a tablet which unlock the key to sealing the void forever.
In terms of gameplay AER is very similar to Sky, except it does not support multiplayer. The puzzle side is quite simple, the focus of the game being more on the exploration part.
The performance of the game is alright, the only issues being the frame drops during most cutscenes which take away some of the emotional impact.
In terms of story telling, AER shows the player fragments of the story through discovering the shadows of former residents. The shadows will form a mundane scene which help with pulling the player into the catastrophic events that lead to the fall of the ancient civilisation.
The artstyle is quite minimalistic but it fits perfectly the tone of the story.