You can find the hang glider in Sons of the Forest in the mountains. It spawns in the same location at the start of each game, so you’re good to go once you find it the first time. Unfortunately, as cool as it is, it has limited utility, especially since there’s no way to put the glider in your inventory.
Atlas is an action-rpg with rogue-like elements where you use your ability to control the ground to fight the enemies and move through procedurally generated worlds.
