Prequel does NOT mean the previous release. The word is a combination of "previous" and "sequel". A previous sequel. If the work was made before, it cannot possibly be a prequel.
No, this not up to debate or "I think it means" or "I would call it a prequel" crap. The word was coined specifically to cover sequels that took place before the original.
"a work (as a novel or a play) whose story precedes that of an earlier work"
I won't debate it, I just don't care.
Seriously, I didn't feel like typing "Will you play a sequel without having played the game released at an earlier date within the series" it wouldn't have fit in the title, whether it is being used correctly or not, it carried the intended meaning of my initial use of the term such that other people could understand it.
Consider your language hijacked, just stay calm and no one'll get hurt. Try anything funny and I'll start using the term postceeding in place of succeeding.
Currently wrapped up in: Half Life, Portal, and User Created Source Mods