Christmas Crisis (CD-i)
If we had a nickel for every time the CD-i had a Christmas-themed, DVC-requiring platformer, we'd have two nickels.
Which isn't a lot, but it's weird that it happened twice.
Cheat Mode and Level Skip
Enter the password 25, 20, 21, 21, 20, 20 on the main menu. While there's no audiovisual indication of its activation, starting a new game will give Santa infinite lives and ammo, as well as make him invincible. These can be toggled through a now-unlocked cheat menu, which is accessed by clicking Santa's face on the main menu.
In addition, the code also activates a standalone level skip: Pausing the game and pressing Button 2 will instantly complete the level the player is in, and move on to the next one.