A fellow redditor mentioned the game Tyrian to me, and after checking, I found openTyrian in the GetDeb repositories. Now, in this blog I usually avoid referring to games that can be found only in GetDeb. This is not because I don’t like GetDeb. GetDeb does frequently provide more current versions of games that exist in the repositories. I have found a current version of Assault Cube is in their list, which is great because at the time I was reviewing it, the official repos had an outdated version that would not allow me to connect and play with other people. There are also many excellent games that one cannot find in the Ubuntu repos, but are made available in GetDeb.
However, I am the kind of Linux user who agrees with the general view that if you’re using a distribution of Linux that features repositories, you should nearly always stick to applications that are found in them. There are sound reasons for this.
GetDeb is still labeled “Beta”, and provides unofficial packages for Ubuntu (and by extension Mint, the distribution I love). But GetDeb packages are not reviewed by Ubuntu, and are updated when their maintainer has time, not always on a consistent basis.
So yes, there are good reasons why some people might want to add the GetDeb repository to their sources.list. However, just as with most other things Linux, you should make sure that it is the right solution for you, and not just say “oh cool, more games!” and add the PPA without another thought. (PPA = personal package archive).