Frogger, a beloved arcade classic from Konami, saw multiple releases on Sega hardware. The different sets (1, 2, 3) likely represent variations in the game's code or hardware implementations.  These iterations of Frogger maintained the core gameplay of guiding a frog across a busy road and a river, but might possess minor differences in graphics or sound effects, or even difficulty levels. These variations are a testament to the original game's widespread popularity and adaptability across different platforms.

Frogger (Sega set 1)

Frog Feast (PGM)