There’s a new free game at Epic Games called Warpips (normally $16.99). It’s a military strategy game, and I’ll let them describe.
Warpips is what would happen if Command and Conquer and Nexus Wars had a baby made out of tanks and napalm! Set loose the engine of war and watch the chaos of physics-based combat explode onto the battlefield! Assemble your army from a diverse roster of infantry, vehicles and airplanes. Deploy troops, call down airstrikes, and launch missiles – all without that pesky micromanagement.