System Protocol One is a tower defense game with old-school style vector polygon graphics and a catchy techno soundtrack. Its unique plot is computer related, and everything in the game is in terms of computers. You are a security administrator charged with protecting his company’s system against viruses, which are the enemies that come across. By using cache (resources), you create a number of anti-virus programs (which are the towers you’ll build) to stop them. Just like any good tower defense game, you’ll have a variety of towers to use with a variety of different abilities. The game is quite challenging, and the tutorial is quite lengthy, which may intimidate players. However, the game is easy to pick up and play, and players who have a passing knowledge of Tower Defense games will have no problem playing this. Mastering it however, that’s a whole different story. It’s available for $10 on Steam, and of course they’ll have specials on it frequently.

First starting life as a iphone/android game, Dungeon Defenders has since graduated to an PC/Xbox Live/PSN best seller. This hybrid of action RPG and tower defense has since become a hit with over 600,000 players worldwide. As one of 4 characters, your mission is to defend your crystals against hordes of oncoming invaders, either by your skills or your selection of defenses. Each character class has their own upgradable skills, and unique defenses. Several other classes have been added via downloadable content. The game is even more fun when you join up with other players via co-op. Weather you’re a casual gamer, a fan of tower defense titles, or a fan or RPGs looking for the next big smash, check this out.