Swords and Soldiers HD is temporarily free on Steam right now.
Game Description: Rewrite history as you take control of the brutal Vikings, the devious Aztecs or the crafty Chinese in their global quest to win the favour of the Gods!
Swords & Soldiers is a side-scrolling strategy game that lets you control an entire army and lets you wield devastating magical abilities. Demolish your enemy’s castle at the end of these two-dimensional battlefields and lead your troops to victory!
Instructions: All you need to do is to add the game to your library and you get to keep it forever.
Notes: Swords and Soldiers HD is a strategy side-scroller, with very positive Steam reviews.