Is the PSP Go the Smallest Handheld Gaming System Ever? No, But Close

The PSP Go is remarkably compact, but it is not the smallest handheld gaming system ever invented.

Smaller Handhelds

• Game & Watch Series (1980–1991): Nintendo's single-game LCD devices were credit-card sized and significantly thinner.
• Nintendo DS Lite (2006): While slightly thicker, its clamshell design makes it smaller in volume when closed.
• PocketGo S100 / RG350M (Modern Retro Handhelds): These Linux-based emulation devices are notably smaller than the PSP Go.
• Analogue Pocket (2021): Slightly larger in footprint but thinner; it plays original Game Boy cartridges via FPGA.

The PSP Go remains one of the smallest disc-less, 16-bit/32-bit era handhelds, but it has been surpassed by modern miniaturization.