CD-i member Bewny35 did some research on this site and among others and he discovered that only 70 CD-i games have a USA catalogue number in North America. A game like Labyrinth of Crete never saw a physical release in the USA on CD-i, it was only published in Europe. However, this game was on the shelves for about 1,5 years. In the meantime, PIMA (Philips Interactive Media of America) had testing discs with a USA catalogue number reserved for it. The same counts for games like Zelda's Adventure and Micro Machines for example. Both have USA catalogue numbers, but these two also did not see an actual physical release. I have by the way the official release list from PIMA, this might help you. You can safely say that PIMA stopped publishing july 1995. Titles after this date were cancelled in USA anyway. If you're just looking for the numbers, these catalogues will help you to find more.
3rd Degree
The 7th Guest
A Great Day at the Races
ABC Sports Presents Power Hitter
ABC Sports Presents The Palm Springs Open
Alice in Wonderland
Alien Gate
The Apprentice
Axis and Allies
Backgammon
Battleship
Burn Cycle
Caesars World of Boxing
Caesars World of Gambling
CD Shoot
Chaos Control
Clue
Clue 2: The Mysteries Continue
Connect Four
Dark Castle
Defender of the Crown
Dragon's Lair
Dragon's Lair II: Timewarp
Earth Command
Effacer: Hangman from the 25th Century
Escape from CyberCity
Flashback
Girl's Club
Hanna-Barbera's Cartoon Carnival
Hotel Mario
Inca
International Tennis Open
International Tennis Open: 2 Player Game
Jeopardy!
Jigsaw: The Ultimate Electronic Puzzle
The Joker's Wild
The Joker's Wild Jr.
Kether
Kingdom: The Far Reaches
Labyrinth of Crete
Laser Lords
Lemmings
Link: The Faces of Evil
Litil Divil
Lords of the Rising Sun
Mad Dog McCree
Mega Maze
Merlin's Apprentice
Micro Machines
Mutant Rampage: Bodyslam
Mystic Midway: Phantom Express
Mystic Midway: Rest in Pieces
Name That Tune
NFL Football Trivia Challenge
NFL Football Trivia Challenge: '94/'95 Edition
NFL Hall of Fame Football
NFL Instant Replay
Pinball
Sargon Chess
Space Ace
Striker Pro
Tetris
Text Tiles
Tox Runner
Thunder in Paradise Interactive
Video Speedway
Voyeur
The Wacky World of Miniature Golf
Who Shot Johnny Rock?
Zelda: The Wand of Gamelon
Zelda's Adventure
Zombie Dinos from Planet Zeltoid
[Thanks, Bewny35]