GemCraft comes to Steam in this updated release of the original free browser game in the wildly popular tower defense series from Game in a Bottle. With a new game mode, nearly thirty new levels, and enhanced graphics, there's no better time to find out why this series is so beloved, or to support the developers who have made it for nearly a decade.

A unique massively multiplayer strategy game by Jason Rohrer. Build an elaborate system of in-home defense to protect your valuables and loved ones. Then break into other houses to get the cash you need to upgrade your system!

Zombies and Cheepies and Succubbi, oh my! It's so tough being a landlord in the mythical 21st century. You have to contend with groups of creatures who can't stand each other, and everyone has constant demands. On top of that you have groups of adventurers who want only to steal your hard-earned money. This storyline is the genius behind Petit Depotto's simulation/defense hybrid, Unholy Heights. Be you a hard-nosed landlord or a more gentle, giving one doesn't matter as long as they fight your enemies at your every beck and call.

This barbecue is being crashed by some seriously unruly lizards of the prehistoric sort! Most gophers would turn tail, but you're not giving up your delicious steaks without a fight! Plan strategically and make use of a variety of clever tower types to defend your 'cue against incoming dinos of all sorts, ranging from hordes of sprightly compys to enormous bosses in this indie defense game.

In the medieval fantasy world of Trouble With Robots, robotic lifeforms from outer space have come to turn the world of Middle Turf upside down, destroying old villages and replacing them with futuristic highways and strip malls. You'll have to build your best deck full of spells, powerful trolls, dwarves, and elves (not to mention angry pitchfork wielding peasants!) to stop the invasion and bring peace back to the land in this lean little card battle game, that picks a few elements and does them right, rather than trying to juggle more than it can handle, leaving you with a satisfying experience that you can come back to and improve, even if you are a gamer on a time-budget.

Mooooo! Do you hear that? It's the sound of cows being abducted! In this tower defense game from Lightmare Studio, you and your pal Barney must use your wits and whatever you can find lying around the barn to protect the cows from the aliens who crave them. Be it an explosive grill or poisonous gasses, you'll find plenty of ways to keep the invaders out of the cow field.

Necro Gaia is a short arcade defense game from Lazy Brain Games, creator of a few other freeware indie games such as Mecha Spider Island and Infernal Edge. This intense little release puts you in control of a small blue planet called Terra, a lovely little Earth-like rock orbiting a sun that is traveling to another galaxy. You have to stay along for the ride, but the trouble is, all sorts of dangerous things are floating in the blackness of space. By changing your orbital position as well as summoning some temporary planetary friends, you can help Terra survive her journey to her new home, defeating the all-consuming Necro Gaia in the process!

It's rough getting thrown in the Pit. Mainly because everyone there has the Plague, and nobody ever comes out... at least, not until you. Instead of dying, you, a mild castle librarian, unlock a hidden power within yourself that lets you and your friends battle monsters on another plane... and grants you the chance to save the world. A fantastic and engaging indie game from Level Up Labs that blends strategy, tower defense, fantasy, comedy, and even RPG elements for one wildly addictive game.