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It’s a Japanese game compatible with the Japanese Master System or Mark III, which uses a different sized cartridge than the overseas SMS. The Japanese Sega SG-1000 used this same size cartridge, and the Japanese SMS/MKIII were backwards compatible with them.

The Samsung Gam-Boy (South Korean version of the Master System) also used the Japanese-style cartridges.

In Japan, they used the “Gold Cartridge” branding for first-party releases and “Silver Cartridge” for third-party releases.

The “Games” series was made by Epyx. First was Summer Games, followed by Summer Games 2, Winter Games, World Games, California Games, and California Games 2. They also released The Games: Summer Edition and The Games: Winter Excision. All of these games follow the same basic format.

California Games did have some more versions, Apple II, Apple IIGS, DOS, MSX, Atari ST etc.