Capcom Generation 4 (The Best)

The self-titled 'Proud, Lonely Heroes': Commando, Mercs and Gunsmoke. All three worthy of preserving for future generations, especially the lesser known, forced scrolling shooter Gunsmoke set in the Wild West complete with rideable horse power ups. Mercs also still plays like a dream. And all thankfully playing in full 60Hz with tate mode, unlike the Pal version.