Trivia Question: Four For Four?

Hey, let's try some Steve Jackson Games trivia! This might not become a regular feature, but at the very least, I stumbled across this one, and I thought it was cute enough to share.

Unless I've fumbled my Research roll horribly, Steve Jackson Games has never had a release with a number of characters fewer than four. (But see below . . .)

However – again, as best I can determine – we have had a number of releases that are exactly four characters. In fact, if I'm counting right, we've had four such products.

Interestingly enough, these four releases have spanned a few different areas of the company. All four are currently available to purchase.

So . . . what are those four releases?

If you think you know, drop a line on the forums. No prize for being correct – just the smug satisfaction that comes with having the right knowledge at the right time. I'm not sure when we'll run the answer, but it should be soon.

As a bonus question: Among our published products, which title does have fewer than four letters . . . and why am I not counting it for this trivia's purposes? (And, no, I'm not thinking of TFT, because that's not its full name . . .)

-- Steven Marsh