Mulaka is a 3D action-adventure set in the landscapes of northern Mexico and built on the indigenous culture of the Tarahumara. Rather than borrowing a culture as decoration, it makes that tradition the foundation of its world, its creatures and its story. It is an interesting example of an indie team building a whole game around a specific living tradition.
Semblance is a puzzle platformer in which you can deform the world: press into a surface and it stays bent, reshaping the level into the path you need. Playing with that single mechanic, the game keeps finding fresh puzzles in soft, squashable terrain. It was developed by the South African studio Nyamakop and is a good example of one idea explored thoroughly.