The Mommy's Best Action Pack +OST features all 4 games plus all 4 soundtracks! And it's a proper Steam 'Bundle' so you'll only be charged for games/soundtracks you don't already own. If you already have Weapon of Choice, but don't have the others, this will not charge you for WoC!
http://store.steampowered.com/bundle/2596/
Thank you for your support and for those that have already purchased--we appreciate it!