The SG-1000 had 75 games and 24 programs officially licensed from Sega. Additionally, there are 12 games and 19 programs released by John Sands Electronics.
Othello Multivision Cartridge List
The Othello Multivision is a licensed variant of the SG-1000 console, manufactured by Tsukuda Original and fully compatible with the SG-1000, and was released only in Japan. The console comes with a copy of the game Othello (which is not to be confused with the earlier listed title which differs from the 1985 cartridge title Sega did) built into the unit, and eight additional titles were released by Tsukuda Original.
The Sega Card Catcher is an adapter used to run card software distributed on Sega's My Card format. Since neither the SG-1000/SC-3000 nor the Mark II have a card slot, the Card Catcher is required for using My Cards on these systems. However, a card slot is built into the SEGA Mark III/Master System, making the adapter unnecessary for that system.
BASIC cartridge
Other
The drawing/painting program TV Oekaki (Eng. trans.: "TV Doodler" or "TV Scribbler") uses a drawing tablet that connects directly to the cartridge.
John Sands Electronics SC-3000 Cassettes List