By A Mystery Man Writer
Greg Martin (1956–2013) - Video Game Artists - (OVGA) Original Video Game Art
How Martin's art influenced me
Greg Martin – A Tribute – MegaBites
Retro gamer №151 by Michel França - Issuu
Greg Martin Sonic Re-design
Greg Martin Sonic Re-design
Greg Martin, Creator of Sonic the Hedgehog Video Game Cover, Dies at 57
What if Greg Martin drew the sonic mania cover ( I forgot to post it here) : r/SonicTheHedgehog
What if Greg Martin drew the sonic mania cover ( I forgot to post it here) : r/SonicTheHedgehog
Wired Magazine December 1993 Sonic the Hedgehog Man of the Year No Label
aonschwartz, Author at Mangoprism
CryptoPunkets #59 - CryptoPunkets
American Sonic, Page 2