While not finished illustrations like the posts before, some concept sketches and a character size chart for the original "Shantae" Game Boy Color game (more at Shantae (2002) promotional art - MobyGames )
The game was also originally supposed to come out on Playstation and be a 2.5 Platformer. More cancelled video games: Punisher 2 Punisher Central: PC POST #121: Character Designs - Unreleased PUNISHER 2 game Crank the Weasel
I've always quite liked the darker and grungier industrial aesthetic the original Half Life 2 Beta was going for.