In 1999, Sega released their final home console, the Dreamcast. Among several features it had that were new to game consoles, there was a built-in modem. Few games used it, and even fewer used it well. But one used it phenomenally.
Phantasy Star Online wasn’t the first online multiplayer game on the Dreamcast, but it was absolutely the most ambitious. You could customize your own character, choose your abilities, and pick which weapons you enjoy using the most.