Stronghold Crusader HD – get it free from Amazon
Amazon is having a PC sale and one of their promotional items is actually completely FREE: Stronghold Crusader HD – the recent HD re-release of popular Stronghold Crusader.
You must have an amazon.com US address for this to work. Most android users already have that to utilize the Amazon free app offers. Moreover you will need a “Stronghold Kingdoms” account, which is the free 2 play game.
1. Create your free account in Stronghold Kingdoms
2. Purchase Stronghold Kingdoms from Amazon (for free)
3. Purchase Stronghold Crusader HD, initially a $10 game but if Amazon detects Kingdoms already linked to you account then the checkout price will become $0.00
As a side note: 16-bit arena is also right now free on Amazon (also a $10 game).