The iPhone has served as a natural platform for gaming since it first hit the market. Having a little time-killer with you when you need it is very appealing.

While Apple's App Store contains thousands of games that you can download and play on your iPhone, options were more limited in the iPhone's early days. As a result, some developers created games that could be played in a Safari window, tailored to mimic the look and feel of non-web-based games before such games were widely available for download.

More than a decade after the iPhone's release, many of those Safari games are still around. They may seem rudimentary, but most of them are free and — like their platform-app counterparts — addictive wastes of time. As an added bonus, the Safari-based games don't require a download, which is handy if you're constantly struggling with the problem of running out of storage space on your device.

These games do not require installation. Simply open your iPhone's Safari web browser to these sites and you can start playing!