"To get the Holidays started with a BANG," writes id sister company and publisher Bethesda on its company blog," id Software is kicking off the 12 Days of Christmas iPhone App sale starting today through January 1st 2010."

Technically, the id sale doesn't include Wolfenstein RPG as that's published by Electronic Arts, but since it's temporarily on sale for $0.99, we've thrown it in the list. Just be forewarned that the discounted price may not last as long as the others.

• DOOM Classic - $2.99 (Originally $6.99)

• DOOM Resurrection - $1.99 (Originally $9.99)

• Wolfenstein RPG - $0.99 (Originally $2.99)

• Wolfenstein 3D Classic Platinum $0.99 (Originally $1.99)

And should you be channeling your inner Scrooge, Wolfenstein 3D Lite is still free.