Codex Mortis is the world’s first fully playable game created using generative AI tools. Players can now try the “necromantic bullet hell” game with a free Steam demo. The game proudly embraces its AI-driven development, turning it into a selling point.
A Fully AI-Created Game
The studio behind Codex Mortis claims it is the “world’s first fully playable game created 100% through AI.” This bullet hell game draws inspiration from Vampire Survivor and uses AI for all aspects, including code, art, sound, music, and text. The team applied AI tools to create every part of the game.
Gameplay and Visuals
Codex Mortis lets players use dark magic to fight off hordes of undead enemies. The game combines five types of necromantic powers in both solo and co-op modes. It may remind players of Vampire Survivor, with its fast-paced action and army-building mechanics.
The visuals have a retro style, but they do not live up to the high expectations set by the trailer. The in-game graphics are less polished, and controller navigation can be confusing. However, the simple, retro design may still appeal to fans of bullet hell games.
The Backlash and Future of AI in Gaming
Generative AI in games has sparked debates. Many players and developers worry that it could replace human artists. While Codex Mortis boasts AI-driven development, some fear the loss of traditional artistry in gaming.
Many smaller developers avoid giving AI full control over their projects. They worry about backlash from fans who might feel the quality of the game suffers. Still, Codex Mortis’s low price point for its full release might help it avoid the controversy faced by larger AAA games that use AI.








