The main objective of Snow Rider 3D is to guide a sled through an endless snowy landscape, dodging obstacles and collecting presents along the way. Players must avoid crashing into trees, snowmen, fences, and other hazards while gliding downhill at increasing speeds. The longer the player survives, the faster the sled goes, making the game more challenging and exciting as time goes on. The collected gifts can be used to unlock new sled designs, adding a sense of progress and personalization to the game.