A public beta test phase began in early 2020, and the console's full release would be further delayed to November 2020, due to third-party production issues an overseas partner, responsible for manufacturing printed circuit boards used in the console, closed in mid-2020. The hardware design phase was finished in early 2019, although the console's release was expected to be impacted by a supply shortage of 14nm chips.

Playmaji started taking pre-orders in September 2018, but the console's official website went off-line for several days following high traffic and a DDoS attack. Development on the console continued quietly over the next year, before it was shown at E3 2018. In May 2017, the console was renamed Polymega, while RetroBlox, Inc would become Playmaji, Inc. The console was initially set to release in early 2018, although it faced several delays. He sought to create a modernized console capable of playing such games without the need for modifications. There, he purchased numerous PC Engine games, but was disappointed in the amount of console modifications needed to make them run on a modern HD television. Bernal was inspired to create the console after taking a trip to Japan in 2015. It would be produced by RetroBlox, Inc, a Los Angeles-based company founded by Bryan Bernal and Eric Christensen, both former employees at Insomniac Games. The console was announced in January 2017, as the RetroBlox.

It was announced as the RetroBlox in 2017, and faced numerous delays before being released in September 2021. It includes a built-in CD drive, while separate add-ons known as Element Modules provide support for cartridge-based games. It also supports cartridge-based platforms, including Nintendo Entertainment System (NES), Sega Genesis, Sega 32X, Super Nintendo Entertainment System (SNES), and Nintendo 64. It is a retro gaming console offering backwards compatibility with several CD-based platforms: PlayStation, TurboGrafx-CD, Neo Geo CD, Sega CD, and Sega Saturn. Polymega is a home video game console developed by American company Playmaji, Inc.

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