Great to see that this has been added.
I've a few comments I can offer:
- No card games? 9 were released over here (My Hero, Ghost House, Teddy Boy, Transbot, Super Tennis, Hang On, F16 Fighter, Spy vs Spy & Bank Panic)
- Arcus Odyssey, Light Corridor and Light Force- These should probably be in the Rumour Mill - I've only seen these mentioned in older online lists, never actually owned by anyone, or on eBay. I stand to be corrected though.
- Most 3rd Party games are incorrectly listed as being published by Sega (I could supply a correct listing if needed)
- The games listed twice (as published by Sega & US Gold) were only published by US Gold
- Mortal Kombat 1 & 2 were published by Arena (Acclaim off-shoot)
- Road Rash was published by US Gold, under license from EA
- F16 Fighting Falcon was called F16 Fighter over here
- Great Soccer is the US name for World Soccer
- The full name for World Cup '93 is Tecmo World Cup '93
- (I believe) Hang On/Astro Warrior and Hang On/Safari Hunt were US only, but we got the Marksman Shooting/Trap Shooting/Safari Hunt combo
- Speedball and Xenon 2 were both orginally published by Image Works, and later rereleased by Virgin
That's all for now, I'll let you know if I spot anything else. Overall a great job though, and the rarity values seem pretty spot on.