#2 Cortex Command
Cortex Command is a game that’s part Worms, part Terraria, and part Tower Defense. Your role in this 2D sidescrolling game is to build a base containing a disembodied brain and defend it from the AI enemy’s army with a host of soldiers, automated sentries, and weapons at your disposal. As you fend off waves of enemies, you must mine beneath the surface for resources with which to build further defenses and upgrade your army.
Being the disembodied brain that you are, you’ll be able to assume direct control over your units to move them around and fire their weapons. The game’s physics engine allows these battles play out very much like a real-time Worms.
You can also conduct a variety of missions in Cortex Command, some of which challenge you to recover lost artifacts in underground, zombie-infested caverns; to defending your brain from an all out attack.
Like so many other games on this list, Cortex Command remains in development with new features being added to it at a reasonable pace.