Project Mirror Labyrinth

Project Mirror Labyrinth (PML) is a roguelite deck-builder RPG on Roblox developed by the Project Mirror Labyrinth group, drawing direct inspiration from Slay the Spire, Library of Ruina, and Limbus Company. Launched in November 2025, it has reached 5.1 million visits with a 97.1% approval rating from over 61,000 votes - a remarkable score for one of the most mechanically deep games on the platform.

Each dungeon run starts fresh from the NO ENTRY gate in the lobby - procedurally generated floors, a random card pool, and permadeath if you fall, ensuring no two runs unfold the same way. Combat draws from Project Moon's design philosophy with sin affinity and emotion level mechanics translated into Roblox:

• 💎 Reflections as the cards and abilities composing your deck, collected during runs from encounters and shop purchases
• 🗺️ Procedurally generated dungeon floors with branching paths including combat nodes, shops, rest sites, and events
• ⚔️ Relics as passive mid-run items that modify mechanics and create the synergies that carry successful high-difficulty runs
• 💰 Fragments as the meta-currency persisting between runs, spent in the shop to expand your available card pool
• 🏆 Sin Affinity and Emotion Level combat systems adapted from Library of Ruina, giving PML far more depth than typical Roblox card games

Managing Fragment spending between runs is one of the deeper strategic decisions outside of active dungeons, since the shop rotates and each run's card pool is random. Weekly Tuesday maintenance around 2:00 PM is when most new content arrives, making PML one of the most consistently updated games in its genre.