-RPGs-
Surging Aura (French translation exists, being worked on afaik) —
RedComet is working on one, but I'm not sure if it's English or French
Maten Densetsu — it's actually called
Maten no Soumetsu and it's another RPG by the Blue Almanac developers
Dragon Slayer — disambiguation: the Dragon Slayer and Dragon Slayer 2 are actually the first two
The Legend of Heroes games
Dragon Slayer 2 (1st game is available in English for the TG-CD, MIJET was working on this one in 2007)
Fushigi no Umi no Nadia / Nadia and the Secret of Blue Water —
someone named KM is working on it
Patlabor
Rent-A-Hero (being worked on afaik) —
by one "Paul Jensen"
Might & Magic 3 (released for Mega CD, cartridge version available, rumored to be unfinished?)
Sorcerian (incomplete translations exist) — Zebbe said it's being worked on? not sure what the status is
Madou Monogatari I — and I'm doing this now
-Strategy-
Vixen 357 — this appears to be just Langrisser 1.5 In Space (even compariing the code real quick it appears to be an elaborate art hack =P ) but eh — also I doubt the integrity of the dump we have; can someone send me pictures of the official game from a TV that show the Masaya logo and the title screen? thanks
Dyna Brothers
Dyna Brothers 2
Hybrid Front
Lord Monarch
Ninja Burai Densetsu
Bahamut Senki
Taiga Drama Taiheiki
Kishin Daisenryaku / Panzer Commander (an incomplete translation exists) — actually called "Kishi Densetsu"
Sangokushi Retsuden
Super Daisenryaku
Zan: Yasha's Waltz
Ghengis Khan 2 — this was released in English under that name =P
Taikō Risshiden
Nobunaga's Ambition 2 — ok there were three Nobunaga games released for the Mega Drive, but only one, Nobunaga no Yabou: Zenkoku Ban, was released in English on the MD
-Adventure-
Psy-O-Blade Moving Adventure
Star Cruiser — this is the one I want to do next; in fact I'm already ready to do a script extraction. It's a 3D space adventure by Arsys for Japanese computers ported in 1990 by NCS... and at 4 megabits (512KB) I'm wondering what NCS was thinking when they decided to give us the cancelled-in-Japan Trampoline Terror! instead
Shura no Mon
From TV Animation: Slam Dunk ! — this is really a sports game in disguise; once you get past all that text you get to the actual game =P
Yu Yu Hakusho Gaiden — this is the Yu Yu Hakusho MD game that no one knows exists (as far as I'm aware): it was developed by Nextech
-Action- pretty much everything here can be played without knowledge of Japanese except where noted; unless you want story
Magical Hat no Buttobi Turbo! Daibouken (released as Decap Attack, basically a completly different game)
Magical Taruruuto-Kun
Doraemon: Yume Dorobouto 7 Nin No Gozansu
Crayon Shinchan Arashi — need to know Japanese
Bishoujo Senshi Sailor Moon
Metal Fangs — need to know Japanese
Dahna - Megami Tanjou
Gouketsuji Ichizoku / Power Instinct
"Contra J" (way easier than US version)
Kujaku Ou 2 (aka Mystic Defender) — I'm pretty sure this is completely identical
Panorama Cotton
Mamono Hunter Yohko - Makai Kara no Tenkosei
Dragon Ball Z - L'Appel Du Destin (almost complete translation exist)
Hokuto no Ken (released as "Last Battle")
Osomatsu Kun Hachamecha Gekijou
-Puzzle / Misc- most of these don't need translation unless you want story
Doki Doki Penguin Land MD (SegaNet game)
Puyo Puyo 2
Mega Panel
Shi Kin Joh (partial translation by Tony H:
http://codehut.gshi.org/Download.htm ) — this one has text?!
Tanto-R
Ichidant-R
Hyokkori Hyoutanjima: Daitouryou wo Mezase!
Jantei Monogatari
Dial-Q: Kyuukyoku Mahjong - Dial Q o Mawase! =P
Mega Q - The Party Quiz
-Sports-
Aah! Harimanada
High School Soccer MD - Kunio Kun (aka "Nintendo World Cup Soccer") — yep, this was a port of the original Kunio-kun NES game, done by PALSOFT a year after they did the Undeadline and Double Dragon 2 ports (fun fact: those were released on the same day in Japan — I wonder which got the most attention during development =P )
Super League Baseball (released as "Tommy Lasorda Baseball") — it was also called Super League in Europe. The three games really only appear to differ in what teams you can pick from...
Super League Pro Baseball '91 (released as "Sports Talk Baseball") — is this really the case? if so quite a bit has changed...
Dodgeball Danpei
Battle Golfer Yui
J-League Pro Striker
J-League Pro Striker: Perfect Edition
J-League Pro Striker: Final Stage
Miracle Nine Baseball
Kyuukai Douchuuki Baseball
F1 Super License
F1 Grand Prix: Nakajima Satoru
Boogie Woogie Bowling (released as "Championship Bowling") — is there anything different other than the playlist?
Cutie Suzuki Ringside Angel
Not listed: (most) Mahjong games, Golf sims, Ransai no Hasha, Nobunaga's Ambition "0"
Ransei no Hasha is another strategy game...
Still needs a lot of work: List of Chinese & Sega CD games
-Chinese-
Water Margin ("Tiger Hunter Hero Novel") — what is the Chinese name?
Fengshen Yinjiechuan
Ya Se Chuan Shuo (RPG) — if this has the same text engine as Barver Battle Saga... (I do have the text drawing routine identified)
Yang Jia Jiang: Yang Warrior Family (beat 'em up) — this one has text?
[there are far too many other unlicensed Chinese games and I'm trying to document as many as I can]