Save $6.99 (regular price) and get the full unlimited version of 4 Elements II HD for iPad for free as a special Christmas gift from Playrix! Offer valid for 24 hours only! Try Royal Envoy 2 HD for free as well.
Company site: http://www.playrix.com/newsletters/2012/dec/19-ipad.html
Note: Says 24 hours only and I got the email about 10 hours ago so I don't know how much longer it's going to last.