SCAWAR (a hidden gem of a game) has a sale going on through the weekend. The first half of the game is free, the second half costs $2, however for the weekend it's 50% off and is $.99. Also the in game currency is on sale as well, though it completely optional (like Temple Run), you can get 20%-50% off your in game currency purchases as well. If you haven't played this game yet, you should. If you have already played it, now is a good time to make any wanted purchases.
SCAWAR - https://play.google.com/store/apps/details?id=com.punchwolf.android.scawar&hl=en
SCAWAR - https://play.google.com/store/apps/details?id=com.punchwolf.android.scawar&hl=en