Six-Guns is a freemium sandbox cowboy game that models itself after the popular console game Red Dead Redemption. While it may not be on par graphically with the game it resembles, Six-Guns definitely still has good-looking graphics as you explore a huge world and complete quests. The control system is like in many first-person shooters on the iPhone: move your character using a control stick on the left side, and look around by swiping the screen on the right.
The game is set in both Oregon and Arizona (with a way to fast-travel between regions). As you explore, you'll come across towns and people with missions that span the entire map. Fortunately, you have your trusty horse who's only a whistle (button-push) away. There are 40 missions in Six-Guns, with some being as simple as delivering an item and others that have you racing horses for cash.
The freemium model here is very generous--you can play the game to the end without ever spending a cent. But if you want a leg up, you have the option to buy extra coins, extra stars (for premium items), different horses, and extra health packs. You can buy single items or buy package deals that unlock a group of items, all of which can be found in the Shop (button in upper-left corner of the screen). To unlock everything at once, it costs $99 through in-app purchase.
Six-Guns is one of the best games we've seen on iOS devices and the fact that you can finish the game for free makes it a must-download for any iOS gamer.