Toki is a relatively obscure platform-based arcade game, by Japanese developer TAD Corporation, which was first released in 1989. And it is as bloody hard as nails!
Draconus is a 1988 release on the Atari 800 by British developer Zeppelin Games. It is a platform game with more than a hint of Metroidvania about it.
Cosmic Spacehead is a 1993 Sega Megadrive release for British publisher Codemasters. It is, in fact, an enhanced remake of a previous Codemasters game, Linus Spacehead’s Cosmic Crusade.
Pier Solar and the Great Architects is a famous homebrew Role-Playing Game released in 2010. It was developed by a team called WaterMelon and was initially released on cartridge exclusively for the Sega Megadrive.
Since then, though, it has been ported to a number of different platforms, including HD remakes for Dreamcast, PlayStation 3 & 4, Wii U, PC, XBox One, and Android.
MUSHA is a well-liked Megadrive shooter, made by famed Japanese developer Compile. It is part of the Aleste series, but features a ‘mecha’-suited protagonist fighting against a super computer that has taken over the Earth, rather than a spaceship.
A relatively obscure Taito arcade game from 1989*, Fighting Hawk is a vertically-scrolling bullet hell shooter where you fly an A-10 ‘Tankbuster’ up the screen, fighting its way through waves of enemies and bosses.
Legend of Mana is the fourth game in the Mana series. It was once again directed by Koichi Ishii and was published by Square on CD-ROM for the PlayStation only in 1999.
Mercs is a classic arcade shooter from 1990. It was jointly developed by Sega and Capcom and features simultaneous three-player cooperative gameplay.