Concord, Marvel’s Avengers and more lessons from 5 wild years of live-service games

For more than a quarter-century, game makers have chased live-service games. Ultima Online, Everquest, and World of Warcraft turned game buyers into long-term subscribers, and in the wake of Blizzard’s breakout success in the MMO space, many game studios tried and failed to create their “WoW killer.”