Early on, the player discovers the L.E.A.F (Leap Effortlessly through Air Functionality) suit, a remnant of some experiments conducted during World War II.

The suit gives superhuman abilities that must be used to explore the vast valley with forests, ruins and magical creatures.

[5] The game was criticized for technical issues, length, and pacing, but heavily praised for its exhilarating gameplay and interesting world.

and that "It boasts an amazing soundtrack, splendid backdrops, and inspiringly propulsive interactions, all of which convince me Valley deserves to be counted as a true sleeper hit of the year", giving it an 8.5/10.

"[8] Alanah Pearce of IGN gave it a 5/10, saying that "Valley very rarely presents the challenge or consequence it really needs to be addictive.