Was bored tonight so I went ahead and did the TD roundup of popular/good games
Tower defense or TD is a subgenre of real-time strategy computer game. The goal is to try to stop enemies from crossing the map by building towers which shoot at them as they pass. Enemies and towers usually have varied abilities and costs. When an enemy is defeated the player earns money or points, which are used to buy or upgrade towers.
The choice and positioning of the towers is the essential strategy of the game. The enemies usually run through a "maze", which allows the player to strategically place towers, but there are also versions of the game in which the user must create the maze out of their own towers. Some versions are a hybrid of these two types, with preset paths that can be modified to some extent by tower placement.
Fieldrunners. The tidal wave of a game that exploded the genre on the iphone and one of the most awarded apps on the platform. Towers create the maze.
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7 Cities. Sometimes overlooked because of the big hit that Fieldrunners was but an excellent game in its own right. Fixed path maze.
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TapDefense. Definitely one of the more popular TD games on the iphone and its free to boot. Fixed path maze.
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The Creeps. Graphics are quite sharp. Nice game that has nice learning curve for beginners as it starts easy and then increases in difficulty where as some of the other games begin at a moderate level of challenge. Fixed path maze. Lite Version is available.
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geoDefense. One of the most uniquely visual looking of the TD games and one of the most challenging. Good value at 99 cents. Fixed path maze. Lite version is available.
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Besiegement. One of the more popular TD games over at the Touch Arcade Forums. Well reviewed on the app store. Mix of open and fixed path.
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ITD. While not the most beautiful game on the iphone this title also has a following over at the Touch Arcade Forum and is well reviewed on the app store. And a free lite version to demo is always welcomed.
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Crystal Defenders. The Square/Enix connection and the final fantasy theme is certainly appealing for some gamers. Control wise it's not a great fit for the iphone compared to the other TD games but if you can get past that hurdle it seems to be a solid TD game.
Edit: There is an update coming that promises to improve the control functionality. Lite version is available. Fixed path maze.
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Zombie Attack! One of the more popular TD games over at the Touch Arcade Forums. Well reviewed on the app store. Lite Version is available.
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Sentinel. Graphically already one of the sharpest games on the iphone, Sentinel seems to be garnering good impressions for a relatively new release. Fixed path maze. Lite version is available.
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ElementalMonster TD. Combines trading cards with the traditional tower defense style game.
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