The Mask is a platform game (based on the film with the same name) developed by Black Pearl Software and published in 1995 by THQ for the Super Nintendo. Early in its development, the game was much different from the final version, as noticed by Mister Syd on the Lost Levels Forum:
Health meter is a series of facial expressions, while the health meter is numerical in actual game.
The Mask’s sprite is completely different in shape, color and design, almost as if this build was completely dismissed and recreated from the ground up.
Visually, I find this the most interesting because it looked like it was going to play more like a brawler than the platformer it turned out to be.
All of the screenshots’ backgrounds are not used anywhere in the final version of the game.
Unused abilities; The Mask has no low-kick, or a (strange-looking) gun that fires projectiles in the game and the mallet is a different color (and pose) but the tornado’s design might of been used in the game.
Some of the enemies in the screen shots I think are actually still in the game, but could be edited a bit in the release; the man with the gun by the bank vault is likely not in the final release though.
The Mask was also planned for the Genesis / Mega Drive, but this version was never released.
Thanks to Celine for the contribution! (scan from EGM #61)