Dyna Brothers is a side-scrolling beat 'em up game released exclusively in Japan for the Sega Genesis. Developed and published by Sega, the game features two brothers fighting their way through various stages, utilizing martial arts moves and special attacks to defeat enemies.  The focus is on cooperative gameplay, though single-player is usually an option. The game's aesthetics are typical of beat 'em ups of the era, featuring pixelated graphics and a fast-paced action style.  Specific details on the plot and characters are less well-documented outside of Japan, but the core gameplay is immediately apparent from gameplay footage.

Dyna Brothers (Japan)

Dune - The Battle for Arrakis (USA)