The selection of games going free for Appvent Calendar has been pretty amazing. As the popularity of the phenomenon has spread, more than one developer has gotten involved each day and made their games free temporarily.
Imp or Oaf may not be for everyone but it's got a certain charm. Imp or Oaf is a guessing game where you must guess if the image you're looking at is of an imp or an oaf. Normal price is $0.99.
The Inferno is a top down-puzzle game which will have players adventuring through all five circles of hell collecting souls, avoiding obstacles, and hopefully reaching the exit of each level before running out of lives and/or time. The 50 level pack is normally priced at $0.99 and is free for today.
IsoWords is a Boggle-like word game where your job is to find as many words as possible within a given time period. The twist is that the letters are found on parts of a cube that is slowly eliminated. A neat game concept that's actually pretty fun. Normal price is $1.99 but Free today.
Meanwhile, BlackSmithGames, the organizers of AppventCalendar, have released their own game to the App Store. Plushed is a side scrolling platformer with a remarkable style and is available for $1.99. We previewed this lovely game back in August, and will have a full review soon.