Sign up to receive each week’s Playlist e-mail here! Also check out our full, interactive Playlist section. ALTO’S ADVENTURE (iOS)  BY SNOWMAN  As an “extreme sport,” snowboarding is typically afforded coarse adjectives: slicing, shredding, and tearing across the snow. Alto’s Adventure forgoes these gnarly hooks to return the sport to its origins as an elegant ride down nature’s greatest landmarks. You slide down an endless mountain chasing llamas, fleeing your elders, and passing by chilled towns with smoking chimneys, all of it stirred with a Peruvian flavor. Points can be scored and stunts performed, but it’s the heavy orange dusks and moonlit rushes provided by the ever-changing environments and…