How do you create a large audience for a game's spiritual sequel? Make sure everyone has played the original. Sega and Amplitude Studios have made Dungeon of the Endlessavailable for free on Steam before its follow-up, Endless Dungeon, arrives on October 19th. You have until July 27th to grab the freebie. You can also download both DLC packs through the community hub "while supplies last," according to the developers. The older game is available for both Mac and PC, although it won't work with Macs running macOS Catalina or newer.