We've had similar threads in the past, but this is a "favorite" topic and not a "teh best!" one.
As far as what counts as development, good programming is cool, but a game is all about the design. Miyamoto doesn't program anything, but he's heralded as some sort of heroic genius.
Here are all the RED PCE games I can think of-
Bonk 1 - 3
Zonk 1 & 2
Tengai Makyou Zirira, Manjimaru & Kabukiden
Kabuki Itouryoden
Gate of Thunder
Lords of Thunder
Devil's Crush
Princess Minerva
Makai Prince Dorabochan
Galaxy Fraulin Yuna 1 & 2
The Tengai Makyou, Bonk and Thunder brands are enough for me. Hudson obviously would be my second favorite and was involved with my favorite RED games. What major games did Hudson do completely on their own? There's Bomberman obviously, and Nectaris... which is either a rip off of, or developed by the people behind Famicom Wars. Gulliver Boy was licensed, but they at least made the game what it was outside of that. Cobra II is also licensed... Other than Bomberman and Nectaris, what are some decent original, created from the ground up games from Hudson?
Aldynes
Be Ball
Soldier series (did Compile employees only work on GunHed?)
Sapphire
Neutopia games -even if they are based on Zelda
Is that it?
I thought they did II, since it was all bare bones like the Saturn ports of their games, but Hudson did I, which is %100 lux.
That's what I thought, anyway.
All I know is, they're both original games and Falcom sells ports of them for PC to this day. No other versions or spin-offs exist as far as I know.