Indie Retro News: Keystone Kapers - Another Atari to C64

Neon Rocketship: April 2023

Keystone Kapers Images - LaunchBox Games Database

Indie Retro News: Frostbite - Atari to C64 conversion #3 from Chopper Command team gets a release!

RGCD: C64 16KB Cartridge Game Development Competition - Status Update #2

Keystone Koppers [Done] - Atari 7800 - AtariAge Forums

C64 Keystone Kapers NTSC

Keystone Kapers C64 Conversion Now Available, Pressure Cooker Is Next – Vintage is The New Old

Indie Retro News

Elevator Action Atari Review

Retro gamer №123 by Michel França - Issuu

c64 Archives - Old School Gamer Magazine