It's December 1st as I type and I'm starting this off with a wonderfully ridiculous little game called Octodad.

You are an octopus trying to blend in to a suburban lifestyle amidst the humans. Don't act too weird or you will raise suspicions and your family members or friends might discover your secret!
http://octodadgame.com/

Happy Holidays!
EDIT: Most of the games in this thread will require you unzip a file that may be in the form of .zip, .rar., or .7z. I recommend the following freeware program for all your zip file needs:
IZarc: http://www.izarc.org/
Running List of the Free Games:
December 1st: Octodad
December 2nd: Casebook: The Missing Urn
December 3rd: Pirates of the Burning Sea
December 4th: Genetos
December 5th: Facade
December 6th: Au Sable (aka All of Our Friends Are Dead
December 7th: Narbacular Drop
December 8th: Barkley: Shut Up & Jam- Gaiden
December 9th: Ichor
December 10th: Masq
December 11th: Gravity Bone
December 12th: Bonesaw
December 13th: The Hitchhiker's Guide to the Galaxy (Remake)
December 14th: Hero Core
December 15th: Merry Gear Solid: Secret Santa & Merry Gear Solid 2: Ghosts of Christmas Past
December 16th: Tiny & Big in Grandpa's Leftovers
December 17th: Last Scenario
December 18th: Alien Arena
December 19th: Nudo
December 20th: I Was A Vegas Showgirl
December 21st: Sanctum
December 22nd: Run Man: Race Around the World
December 23rd: Fate By Numbers
December 24th: Cactus Arcade
December 25th: Christmas 2010
Bootfighter Windom XP
Dash and the Stolen Treasure
D.Nd Poison
Dwarf Fortress
The Endless Forest
Hydorah
I’m OK: A Murder Simulator
Minecraft
Les Miserables: the game of the book
Pirates of New Horizons
Proun
The White Chamber



