Default Controls
← → ↑ ↓ = Directions
A = z
B = x
X = a
Y = s
C (Top-Left Shoulder) = q
Z (Top-Right Shoulder) = e
L2 (Bottom-Right Shoulder) = r
R2 (Bottom-Right Shoulder) = t
Mode = Right Shift
Start = Enter
About the Greatest Heavyweights (Japan) SEGA Genesis Online Game
Hey! Want to experience intense boxing action? Play “Greatest Heavyweights (Japan)” on Sega Genesis online for free in your browser! Choose your favorite boxer and go head-to-head against tough opponents. No need to download anything, just click and play. Get ready to fight your way to the top and become the ultimate heavyweight champion in this classic retro game. Enjoy the nostalgia and excitement of old-school gaming right at your fingertips. Let’s see if you have what it takes to come out on top!
