The Rare Character One-Shot Series

I'm trying to collect this entire set. They seem to have been tie-ins with the movies throughout the 90's (not sure). I have no idea how many there were in total, but I have these ones already (see below).

Does anyone know if there was a Robin, Joker, Batman, or any others? My research isn't giving me much luck. It's hard to Google "Batman Robin one-shot" without a million other results coming up.

I will say, this little "series" is absolutely awesome, and definitely worth it if you haven't checked them out.