​Source: Google Play Store listing and developer documentation (Last updated March 2023).

​Gameplay:
Players manage marine species evolution through card-based mechanics. The core deck includes 87 “Deep Cards” with traits like Bioluminescent Symbiosis (shared resources with 20% depletion risk) and Abyssal Quake (alters food chain order). Environmental events such as Coral Bleaching or Predator Swarms randomly occur, requiring strategy adjustments.

​Free Version:

• 20 basic Deep Cards (e.g., Schooling Fish increases food production; Coral Defense reduces territory damage).
• Daily 1v1 asynchronous multiplayer matches (no ads).
• 3 AI difficulty presets:
  • Easy: Predictable opponent actions.
  • Normal: Mixed aggression/resource tactics.
  • Hard: Prioritizes ecosystem disruption.
• Tutorial for basic rules.

​Paid Upgrade ($7.99 One-Time)​:

• Unlocks remaining 67 Deep Cards (e.g., Sulfur Bacteria converts toxins to energy).
• 21 scenarios with unique objectives (e.g., Hydrothermal Vent Challenge requires surviving extreme heat).
• 5 advanced AI types with behaviors mirroring natural selection (e.g., Scavenger targets resource theft).
• Deck customization tools for solo/multiplayer.
• Cross-platform asynchronous play (Android, iOS, PC).

​Technical Requirements:

• Android 8.0 or newer.
• 450 MB storage.
• Google Play account for save syncing.
• Internet required for multiplayer; solo play works offline.

​Reported Limitations:

• Multiplayer desynchronization occurs in ~15% of matches (per 2023 user reviews).
• Card interactions are less complex than the physical board game (e.g., no simultaneous turn resolution).
• Normal AI difficulty repeats strategies in 20% of matches (source: player feedback).

​Development Status:

• First released November 2022.
• No new content or patches since March 2023.