exA-Arcadia is an indie PC-based arcade platform released in Japan on November 28, 2019, with an international release on January 2020. It's designed as an affordable modern cartridge-based conversion kit in an era of expensive dedicated machines and digital distribution systems (which force operators to "revenue share" titles).
Designed for use as conversion kits for numerous types of JVS-compatible arcade cabinets, it supports numerous arcade configurations (including linked play and support for both 16:9 high-definition LCD screens and 4:3 standard-definition CRT monitors) and swappable cartridges with support for four cartridge slots (which, similar to the Neo Geo MVS, allows players to choose from multiple games installed on the same machine).
While an internet connection is not needed, operators will be able to enable certain online-connected services, including support for smartphone companion apps and integrated Twitch streaming. They can also add their own custom advertisements for the system's attract mode.
As the hardware is not developed by a game studio, games developed for the system are mostly third-party (but published by the exA-Arcadia company themselves) and are commonly ports of games for existing home systems. The Japanese version launched with one game (a port of Aka to Blue), while the worldwide version launched with the aforementioned port along with a port of Shaolin vs. Wutang: Eastern Heroes.