FREE: Cortex Command [Steam Key]

The listing, Cortex Command [Steam Key] has ended.

A project over eleven years in the making, Cortex Command has rich 2D pixel graphics coupled with an extremely detailed physics engine, which allows for highly replayable and emergent real-time action. There is also a turn-based strategic campaign mode which ties the tactical fights together, featuring persistent terrains that will accumulate the battle scars, debris, and bunker ruins through your entire campaign.

Choose from several unique technology factions, each featuring their own sets of expendable soldier bodies, mechas, weapons, tools, and landing craft. Protect your brain, mine the gold, and destroy the enemy cortex in his bunker complex!

More info: http://store.steampowered.com/app/209670/Cortex_Command/
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This game works on mac too! Also includes steam trading cards

Good Luck!