Speaking of iPhones....

Prof. mentioned a couple of classes back that Tap Defense is a decent iPhone game. I try to avoid downloading too many apps for my phone, I get bored of them fast and honestly it looks messy to have a bunch of generic icons filling up that snazzy touch screen. For the bus ride to work, I tended to rely on Word Warp, a game much like text twist, or the NYTimes app (which is really slow and kind of sucks.) I've also dabbled with Katamari- although it is really nothing compared to the real Katamari, it was defintely fun to play a familiar game with new bodily techniques. Any of these apps I just mentioned, I usually spend no more than 30 minutes a day messing with.....
Until Tap Defense.

Tap Defense (screen shot above) is a tower defense game, a subgenere of RTS games which one might recognize from StarCraft or Warcraft. The game is relatively simple: various creatures follow a path to try and get somewhere. You, the player, don't want them to get there. To kill the creatures as they follow the path, the player must build various towers along the path. Seems pretty simple. However, there are a variety of creatures and a range of towers (which cost money and "halos" to develop.) So strategy evolves from figuring out which towers are best to kill which creatures, and where to place the towers to maximize results. The creatures become more numerous and harder to kill as each level progresses. There is also a "cool" feature (though the jury is out in my opinion as to whether it really does much) called the earthquake tower which involves shaking your phone to do damage to the creatures. (Tower options below.)

I could go on, but describing the game in its entirety will just bore anyone who has read up to this point. What really interests me are two questions: What makes a good iPhone game? and secondly; What makes a game addicting, beyond simply fun to play? Beyond the obvious things (like the addictive frustration of not being able to get past level 31 until trying a bajillion times), I think the addiction in this case is partially because of the mobility of the phone. I can play the game anywhere at anytime, so it is like having a pack of cigarettes to resort to whenever I'm bored or in a awkward situation. This applies to mobile gaming in general, which I would argue is more addictive than console game because it is so portable... like cigarettes.
What makes a good iPhone game then, is staying power. Many of the free iPhone games function like the shareware discussed in Masters of Doom, hooking you with a demo or the first three levels- and suckering you into buying it once you are addicted. The trick is making the game addictive enough to buy, or addictive enough that the advertising doesn't drive you crazy. With Tap Defense I haven't noticed any ads, and I don't have to buy it. Honestly, this is part of what makes it a great iPhone game- it doesn't obligate me to do anything. Also, it incorporates the fun of the iPhone- the earthquake feature, without going too far (Katamari fails here because the phone isn't quite sophisticated enough to truly translated the phone movement with the screen movement.) Additionally, it is split into short levels, records high scores, and provides a variety of challenges and levels to explore. It is surprising how many iPhone games do not do this.
The game has myriad youtube videos, guides and forums online- the community aspect that grows from great, well-loved (or hated) games. This also indicates that I am not the only Tap Defense addict. I encourage people with iPhones or iTouches to check it out, or play a tower defense game in general if you don't have these apple products. The levels are short and easy, not consuming the large amounts of time that many rts games do, the killing isn't too brutal, and experimental strategy is important- and you can change yours every time you play. I think I've found my gaming niche (translation: I think I've found an iPhone game that holds my attention for more than a week.)