Fish Tank 2: Build an unstoppable fish army, discover powerful synergies, and survive endless nights in this active-idle roguelite auto-battler where your aquarium becomes a battlefield.

Your fish fight automatically in real-time, but victory depends on constant tactical decisions. Every run is a fresh challenge where you decide what to spawn, when to swap, and which buffs will define your build. Whether you play actively or idle briefly, your tactical choices determine your survival.

No two runs are ever the same - experiment with different fish families, buffs, and talent trees to discover overpowered builds.

🐟 Build Your Ultimate Fish Team

Continuously spawn, swap, and upgrade fish during each run
Unique Abilities: Every fish features distinct attacks, defensive auras, and utility skills.
Every choice matters as you adapt your build in real time.
Balance attack power, defense, and income to survive longer runs

Synergy System: Combine fish families to trigger powerful aura-synergies — the core of a winning roguelike build.

⚔️ Active-Idle Auto Combat
Escalating Waves: Watch your aquarium turn into a battlefield as enemy swarms grow stronger each night.

Decision-Driven Gameplay: Frequent choices shape the trajectory of every run, ensuring no two sessions are the same.

Optimized Engagement: Sit back and watch your progress, or stay active for maximum efficiency and reward.

🌊 Three Distinct Game Modes

Waves – Standard Run
Survive consecutive nights of increasing difficulty. Every second night acts as a checkpoint where you earn Diamonds and draft persistent buffs. Play through Normal, Hard, or Extreme difficulty.

Endless Night – Survival Mode
Prepare during one short day, then survive an endless night where enemies scale nonstop. Compete on global leaderboards for the longest survival time.

Draft – Arena Mode
Draft fish, buffs, and augments to craft highly specialized builds and push deeper for Pearls. Climb the global leaderboard by pushing deeper with optimized builds.

🔮 Deep Meta-Progression
Ascension & Prestige: Death is progress. Use collected resources to unlock permanent stat boosts.

Extensive Talent Trees: Specialize your playstyle through long-term skill progression.

Earn multiple currencies to unlock new fish, talent skill points, and permanent upgrades