From Sega Retro


Nemesis title.png

System(s): Sega Master System
Publisher: Zemina
Genre: Shoot-'em-Up

Number of players: 1-2 (alternating)
Release Date RRP Code
Sega Master System

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Nemesis is a side-scrolling shoot-'em-up game created by Konami and originally released in the arcades in 1985 as Gradius. Its popularity led to the game being ported to numerous consoles and computers, including the MSX in 1986, a port which was subsequently converted into a Sega Master System game without a license and released in South Korea by Zemina in 1987. Roughly half of the home ports are called Nemesis while the others stick with Gradius, the reasons for the change not being fully understood.

The Master System version of the game is identical to the MSX version, running in the graphics mode intended for SG-1000 backwards compatibility. As a result the gameplay is significantly more choppy than its arcade counterpart, and the graphics do not take advantage of the Master System hardware.

The Gradius/Nemesis would skip all Sega consoles which followed, though would eventually see a release on the Sega Saturn as part of Gradius Deluxe Pack.

Physical scans

Master System, KR

Technical information

ROM dump status

System Hash Size Build Date Source Comments
Sega Master System
CRC32 e316c06d
MD5 1f9b5ae214384c15e43e1d8eee00c31f
SHA-1 fbee313aaa8d7acea4acbb763592f73466596113
128kB Cartridge (KR)


NEC Retro has more information related to Gradius

Gradius / Parodius games for Sega systems
Sega Master System
Nemesis (1987) | Nemesis 2 (1987)
Sega Saturn
Gradius Deluxe Pack (1996) | Salamander Deluxe Pack Plus (1997) | Konami Antiques MSX Collection Ultra Pack (1998)
Sega Saturn
Parodius (1995) | Sexy Parodius (1996) | Jikkyou Oshaberi Parodius: Forever With Me (1996)