Default Controls
← → ↑ ↓ = Directions
Z = A, X = B
A = X, S = Y
D = L, C = R
Enter (↵) = Start
Shift = Select
About the Uncle Mario Bros. Nintendo Entertainment System (NES) Online Game
Hey! Want to play Uncle Mario Bros. online for free? Simply open your browser and start playing this classic NES game without any downloads. Join Mario on his adventure to rescue Princess Peach from the clutches of Bowser. Jump, run, and collect coins to defeat enemies and reach the final level. Enjoy the nostalgic graphics and gameplay of this iconic game right from your browser. Let’s go save the princess!