SAVAGE: The Battle for Newerth
Choose to be a commander and you will play an in-depth RTS managing the stronghold, or choose to be a warrior and you will play an intense game of first person combat. With the creation of a new game play genre, RTSS (Real Time Strategy Shooter), Savage expertly redefines the first-person shooter and real-time strategy genres by combining elements of both into one cohesive experience. As the commander in RTS mode, you will tackle resource management, develop a robust tech tree, plan your assault and lead real human players into battle. As a warrior in action mode, you will master many unique weapons, powerful units, and siege vehicles to fight a fast paced battle.

Set in a unique fantasy world eons from now where Humans and Beasts battle violently for their very existence. Savage transports PC gamers to the next level in multi-player gaming. Choose to fight on the side of HUMANITY, armed with science and technology, or take the side of the BEAST HORDE, masters of nature and magic. Each race has its own style of battle, its own leader, and its own way to victory. Which side are you on?
Welcome to Savage

Above is the original Savage which is free to play. The games are a mix of RTS and FPS and meele. I played the first game a few years and back and recently bought Savage 2 from steam from the discount and it's great.

Savage 2 is free to play,with an optional 1 time only pay thing.
If you buy it from steam and setup a new account you will have a prime(Full Access) account. If you do start playing if can you, hate asking shit like this, refer me? My account is insanelol send me a friend request on savage 2.
Savage 2: A Tortured Soul is totally free to play, but you have the option of creating a Prime account for just $9.99. There are multiple advantages to a Prime account, such as two additional inventory slots, unlimited play as Hellbourne units, access to player statistics both online and in-game, and the ability to download a replay of every Savage 2 match ever played! Spread the word, help the development community by supporting companies that want to make unique and innovative games.
Savage 2 - A Tortured Soul