33 Immortals

33 Immortals is an action video game played from a top-down perspective. In the game, the player assumes control of a damned soul who must fight through Hell, Purgatory and Heaven as they rebel against a cruel God who banishes them. The game supports 33-player cooperative multiplayer, and each gameplay session, which lasts around 25 minutes, is comparable to raid missions from massively multiplayer online games (MMO).

Players start each session in the "Dark Forest", a hub world in which players can select their character archetypes (melee, ranged, support, or tank) before venturing through the Eternal Gate into the battlefield. In the first zone, called Inferno, players are initially split into teams of six as they explore the map and completes Torture Chambers (described by the team as mini-dungeons). Once a chamber is completed, players will unlock Relics and trigger God's wrath, which causes the entire map to be engulfed in fire. The remaining surviving players are then split into three teams, with each team having one chance to complete "Ascension Battles", which unlock Legendary Relics that provide global bonuses to the entire team.

33 Immortals was developed by Thunder Lotus Games, the studio behind Spiritfarer. The setting of the game was inspired by The Divine Comedy, with Dante, Beatrice, Virgil, and Charon all appearing in the game as supporting characters, though their backgrounds were reworked to meet modern values. For instance, Beatrice was reimagined from a guide in Purgatory to the "leader of the rebellion", and Virgil becomes a female scholar who is interested in "science, moral values, and the use of weapons".

33 Immortals is Thunder Lotus' first online video game. To meet the challenges of developing an online game, the studio expanded into two parallel development team, and recruited personnel with prior experience working on a multiplayer project. While preparing extensively is essential for players to succeed in raid missions in other MMO games, 33 Immortals was described by the team as a "pick up and raid" experience, as the game streamlines the mission process and allows players to jump into action "as quick and seamless as possible". While the team initially experimented with having 100 players in a gameplay session, the maximum player count was reduced to 33. According to the team, 33 was chosen because each part of The Divine Comedy has 33 chapters.