Bros Original Adventure 1985 is a platformer video game with eight levels and more than 100 stages. It is a classic game that combines elements of platformer, puzzle, and adventure game.

Two brothers are sent to find the princess and bring peace back to the kingdom. They must go through four worlds, under ground, and over land, in order to save the princess. They have to avoid obstacles and enemies on their way, including Goombas, Koopa Troopas, and Bullet Bills.

In each world, the brothers face challenges. In the first world, they must find the gap that will allow them to reach the end of the level. In the second world, they have to avoid an underground maze. In the third world, they must find the way to reach the end of the level by jumping over various gaps. And in the fourth world, they must face Bowser, the enemy who wants to stop them.