not only for game-making, remind this:
the name of anything comes through what happens, not in reverse.
dont try to build something around a word, its just a word.
think about what you wanna do (something with zombies and gore and blood for example). now you need a more or less interesting story in a more or less interesting world ("more or less" is up to your intention to do something special or not), transported trough a method (writing, gamemaking, drawing a picture, make music etc.) in a more or less interesting way.
out of this the (more or less interesting) title is born sooner or later. titling is a process, not a start of anything.
"infestation", yeah, sure it leads to zombies sooner or later in modern ways of thinking^^
its good for reminding your product, but, for my 2 cents, more ordinary than extraordinary.