Hey Paul,
If you decide to keep the list as-is, there are several omissions of format info in the current top post.
If you don't mind tweaking it a bit, I have a suggestion to split the "Released" group by format.
It would be great to even add additional info to your master list, just in case links expire or change.
If the developers are willing to share production runs for any titles. Some like Protocade may be more limited than Darius Alpha, and rightfully so considering how monumental the task was in (2012 was it?) I listed the empty categories because there could be legit entries in some or all of those. Games developed for system 2.0 wouldn't need expensive system cards (for potential customers.) Conversely, somebody willing to take on developing a new system card & game for it, well... that would be a thing, indeed.
Very most importantly. A Huge THANK YOU is in order for all of the homebrew development teams in all levels for keeping the PC Engine/TurboGrafx love alive! You all have been the heart of this community.
RELEASED HUCARDS
ATLANTEAN : Aetherbyte : Action/Shooting (Limited Manufacture - copies made for both regions)
PROTOCADE : Aetherbyte : Action/Compilation (AbCARD - First Physical Homebrew Hucard, promotional copies made for both regions)
RELEASED CD-Rom2 (System 1.0, 2.0, 2.1)
? None to date
RELEASED SUPER CD-Rom2 (System 3.0)
FX-UNIT YUKI : SaruPro : Action
HYPERNOVA BLAST : Mindrec : Shooting
IMPLODE : Mindrec : Puzzle (Includes CRASH & HUMPBALL)
INSANITY : Aetherbyte : Action (pressed CD)
METEOR BLASTER/DX : Mindrec : Action (Includes LOOP, Original release DX is CD-R, re-release is a pressed CD)
MYSTERIOUS SONG : Frozen Utopia : RPG (pressed CD)
PYRAMID PLUNDER : Aetherbyte : Action (pressed CD)
REVIVAL CHASE : BFG : Action (comes bundled with Revival magazine) (pressed CD)
RELEASED Arcade CD-Rom2 (Duo or Pro)
? None to date
?
RELEASED System/Storage Hucards (Think the Games Express system card)
? None to date
?
RELEASED Downloadable ROM
BARBARIAN : F.L : Beat 'em up conversion
BUG HUNT : Cabbage : Action
CRASH : Mindrec : Action (also on IMPLODE disc)
FLAPPY BIRD : Touko : Action
HUMPBALL : Mindrec : Action (also on IMPLODE disc)
HuZERO : Chris Covell : Driving
ISLAND ADVENTURE : Cabbage: RPG
JAMANOID : The HU 6280 Team : Arcade
LOOP : Mindrec : Puzzle (also on METEOR BLASTER DX disc)
NANTETTATTE ENGINE : Aetherbyte : Shooting
PCEFXBOMB : Frozen Utopia: Action
REFLECTRON : Aetherbyte : Action
TONGUEMAN'S LOGIC : Chris Covell : Puzzle
SANTATLANTEAN : Aetherbyte : Shooting
RELEASED Downloadable ISO
INSANTATY : Aetherbyte : Action
ULTIMATE RALLY CLUB : Orion : Driving