Gargoyle's Quest (GB, 1990)
The Adventures of Rad Gravity (NES, 1990)
Captain Comic II: Fractured Reality (PC, 1990)
Corporation (AMI/ST, 1990/PC, 1991/MD, 1992)

MoonShadow (C64, 1990)?

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Commander Keen Episode I: Marooned on Mars (PC

Colorado (AMI/ST/PC, 1990)
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Outliers: 

Todd's Adventures in Slime World (Lynx, 1990/MD/PCE CD, 1992)

​Ghostbusters (MD, 1990)

Cadash (ARC, 1990/PCE, 1991/MD, 1992)

Horror Zombies from the Crypt (AMI/ST/PC, 1990)

Magicland Dizzy (Multi, 1990)

Dizzy 3 and a half: Into Magicland (Multi, 1990)

Super Mario World (SNES) - Proto/Semi-Platform Adventure
Kagerou Densetsu (NES, 1990)
Majin Eiyuuden Wataru Gaiden (NES, 1990)
​Shadow of the Beast II (Multi) 
Danan: The Jungle Fighter (SMS) 
Blue's Journey (ARC, 1990) 
City Hunter (PCE)?
A Nightmare on Elm Street (NES, 1990)(Different)
Treasure Mountain (PCs, 1990)
​Wing Commander (PC, 1990) - Remove?
​​Gordian Tomb (C64, 1990​)