I've done box designs for 9 unreleased Coleco Atari 2600 games (listed in catalogs and featured in marketing flyers):

Cosmic Avenger
Frenzy
Looping
Pepper II
Rocky
Smutfette's Birthday
Tarzan
Time Pilot
Wild Western

If you are interested in them: A single box is EURO 14.00, the complete set of 9 boxes is EURO 115, shipping is EURO 4 (airmail, robust box, no insurance, no tracking, runtime 5 to 7 days).