Was the Game Boy the First Handheld Console? No - History Timeline

No. The Game Boy (1989) was not the first handheld. It was, however, the first successful cartridge-based handheld.

Timeline of Handheld Firsts

1. 1976 — Mattel Auto Race: First handheld electronic game (LED, single-game).
2. 1977 — Mattel Football: Hit clone, popularized the category.
3. 1979 — Milton Bradley Microvision: First cartridge-based handheld console. Interchangeable carts, LCD grid. Commercial failure.
4. 1980 — Nintendo Game & Watch: First successful Nintendo handheld. Single-game LCD, clock/alarm. 43M sold. Not cartridge-based.
5. 1984 — Epoch Game Pocket Computer: Japan only. Cartridge-based, poor sales.
6. 1989 — Nintendo Game Boy: First successful cartridge-based handheld. Tetris bundle, 4-shade STN LCD, 100+ hr battery, link cable. 118M sold (all models).

Why Game Boy Feels Like the First

• Dominant market share for over a decade.
• Defined the category: cartridge + cross-platform IP ecosystem.
• Game & Watch was a "toy"; Game Boy was a "console."

Summary: Microvision = First cartridge handheld. Game & Watch = First Nintendo handheld. Game Boy = First successful cartridge handheld.