Doom Classic :You can't go wrong with this one. A classic 3D game brought into the palm of your hand and only for five dollars. Sometimes nostalgia is a great thing.
2. (Music and Puzzle)
Trism :This little game has taken the iPhone app store by storm. Now one of the most popular iPhone applications of all time, Trism - for only $3 - is a unique puzzle game that is both simple and addicting.
3. (Racing and Sports)
Tiger Woods PGA Tour :Without a doubt the best sports game on the iPhone. For $5 you can get access to dozens of different courses and playable course, and with a control scheme that is simple - as well as great graphics - the game is a must have.
4. (Strategy and Simulation)
Flight Control :One of the most addicting game you'll ever play on the iPhone. Use your fingers to control the path of planes as they come into an airport. The goal? Land all of them smoothly without any collisions. It's easy as first but can get very hard. The best part? Only $1 in the iPhone application store.
Vay :Classic dungeon crawling. Magic. Monsters. Enough said. - but from five different categories.)