If it's for a game then it's usually best to just make a bitmap font system, scraggle and batvink have both made really nice examples, the sort of thing you could impliment in your game really easily.
Truetype fonts are a lot more complicated, more like using a vector art package. It's not something that everyone can make a good job of, because a lot of font design is stylistic, you have to know how to make letters match in style, which is quite a rare trait. It depends on what you need, but be prepared to take a lot of time over a home made truetype font, it's not something anyone can quickly rustle up, unlike a bitmap font.