Sega Ages 2500 Vol. 25: Gunstar Heroes Treasure Box

About

This game is a compilation, containing three titles by Treasure. Everything is emulated, with several additional options to tweak the emulation process, though the sound is slightly inaccurate.
There are extensive galleries for all three games and overseas versions to play. More interestingly, a hidden prototype version of Gunstar Heroes exists.

Release Dates by Platform