The entire official US count is 114.
http://segaage.com/index.cfm?FuseAction=Search.SMSThe NA list (includes Canadian released titles) adds the following titles : Ace of Aces, Assault city (phaser version), Basketball nightmare, Battle outrun, Cyber Shinobi, Danan the jungle fighter, Double hawk, Dynamite Dux, Gain ground, Gauntlet, Golfamania, Impossible mission, Outrun 3D, Psychic world, Scramble spirits, Submarine attack, Tennis ace, Ultima IV, World cup Italia, and World games. I left off the renames (such as American Football vs Walter Payton version). Ultima IV I believe should be on the US list for multiple reasons I will not go off topic on here.
In my personal collection to round it out to 150, I added games that really should have been released here. Mortal Kombat, Ninja Gaiden, Forgotten worlds, Bubble bobble, etc.
