Q: is it possible to install a pc game onto an external hdd and play it off that, such as the sims. Because i have no space left on my pc. thanx
A: Theoretically, it should be entirely possible. There is nothing different about your external hard drive from a software point-of-view. Your computer view external and internal drives the same way. That being said, some game producers *might* have special code in their games to prohibit them from being played off of external hard drives, just to limit piracy. This is unlikely however.