The following is a prototype of Mysterium for the Game Boy, developed by Maxis and published by Asmik. The cartridge was originally owned by Steve McKay, former General Manager of Nintendo’s Mexico division.


Screenshot Screenshot Screenshot


  • Minor changes within the graphic data.

ROM Information

----| File Data |--------------------------------------------------
System:             Nintendo - Game Boy         
BitSize:            1 Mbit
Size (Bytes):       131072
CRC32:              004C1AF7
MD5:                EECABC069331CE1512CBA30442AD2980
SHA1:               82E058A7608A04A2837D0D8FE810270F804B43F3
SHA256:             987A92FA047F3FB51E6251606DADC707C10BB12A67AB4624C46A7530D59CE55B
----| Header Data |------------------------------------------------
Entry Point:        0x0150C300
Logo Code:          Ok
Title:              MYSTERIUM       
New Licensee Code:  N/A
SGB Support:        0x00 (No)
Cartridge Type:     0x01 (ROM + MBC1)
ROM Size:           0x02 (Ok; 1 Mbit; 131072 Bytes)
RAM Size:           0x00 (None)
Old Licensee Code:  0xE8 (Asmik)
Version:            0x00 (v1.0)
Header Checksum:    0x2C (Ok)
Global Checksum:    0x0000 (Bad; 0x8EC2)

Board / Cartridge Images

Cart Front
Cart Back

Special Thanks

Massive thanks to Rezrospect for sending this in for release!


Download Mysterium (USA) (Prototype)