If you don’t want to dish out more cash to get games for your iPhone, there are plenty of iPhone games that are well designed, extremely fun and, most importantly, completely free. Here’s a list of the best free games available based on fun-factor, originality, innovation, and design.

Ridiculously addictive. Involves a lot of strategy and thinking, but is also very fun. Defend your castle by investing in towers and attacking the enemy before they are able to reach the endpoint. The game is simple to grasp but difficult to play. A long list of levels, each more difficult than the last, will keep you entertained for hours.

Trace is another free game that won’t leave you bored. Similar to something you might find on the Nintendo DS, Trace challenges you to traverse 120 levels through 6 worlds by tracing platforms (with your finger) to dodge obstacles and get from place to place. Although simple in design and concept, things get fairly complex as you progress. A great time killer.

Free iPhone game that provides hours of fun. Jelly Car is a unique and interesting game that utilizes the accelerometer and touch sensitivity of the iPhone. You play through several levels on several difficulties (all of which are hard) and try and make it to the end in the shortest amount of time. But, as the title implies, the car is made of jelly and can squeeze between spots and expand to reach higher areas. Challenging and entertaining game recommended for all.

Maze Finger is an awesome game packed with 200 levels and 1000 mazes! Simple but challenging, it requires you to rapidly navigate through mazes using your finger. Its intense graphics and sound effects definitely add to the fun factor, but will likely drive those around you nuts.

Let’s face it – arcades aren’t nearly as popular as they once were, but we all miss playing air hockey. Thankfully, Touch Hockey turns your iPhone into a mini air-hockey table and supports both single-player and multiplayer action. The game is fast paced and addictively fun, but really shines when you play with a nearby friend or online over 3G/Wi-Fi. Great looking graphics add to the experience.