Hadn't seen a topic about this yet. Basically anyone can get all 10 games free, but you have to go on the e-shop each day to get them in order. Also, you have to already own one game from Qubic to start, but they have a free "game" called Coloring Book that counts toward this. Here is a list of the games and when you can get them:
|#||Game||Date available for free|
|1||Robonauts||10th - 15th Dec|
|2||Geki Yaba Runner||16th Dec|
|3||Puzzle Book||17th Dec|
|4||One Strike||18th Dec|
|5||Wreckin' Ball Adventure||19th Dec|
|9||Mana Spark||23rd Dec|
|10||Mystery Game - TBA||24th Dec|
Credit to NintendoLife for making the chart.
None of these have reviewed amazingly well, but most sound decent enough. And they're free!