VS. Super Mario Bros.

Vs. Super Mario Bros. is a two-player arcade version of Super Mario Bros., which was originally released on the NES, in 1986.

Story
Mario (or Luigi) sets out on a quest to free Princess Toadstool from the evil Bowser and restore the fallen kingdom of the Mushroom People. The player's character moves from left to right over a horizontally scrolling terrain. They must avoid obstacles, destroy enemies by jumping on them, collect coins and power-ups and reveal several hidden items throughout the various levels.

Differences
This game is harder than the original Super Mario Bros., with less warp zones and power-ups, and more enemies. Some of the courses were even taken from the sequel, Super Mario Bros.: The Lost Levels, which wasn't released outside of Japan for fear it would be too hard for Western gamers.