FibDefense vs Number Network

Every tower in FibDefense deals Fibonacci damage (1, 2, 3, 5, 8, 13, 21, or 34) and can only fire at a monster if its shot damage is less than or equal to that monster's current HP. No overkill. Ever. This single rule turns every wave into a living math puzzle. Monsters march with HP values that always have a solution, but finding it requires precise placement, careful timing, and knowing which Fibonacci values chain together to reach the kill. When it clicks, towers drop a monster in a perfect cascade. PUZZLE MODE 34 hand-built levels, each one a self-contained problem: a fixed gold budget, every wave shown before it comes, and a verified perfect solution waiting to be found. No random drops, no filler — just you, the numbers, and the cleanest line to a five-star solve. Every world lays out its own boards, so each is a full campaign of its own. The first 8 levels are free; one unlock opens all 34 on every world. SIX WORLDS Fantasy, Sci-Fi, Military, Retro, Pirates, Horror. Each world has its own tower sprites, nine tiers of creeps, a handcrafted environment, and a unique boss that arrives as your ultimate challenge. FIVE DIFFICULTY LEVELS Relaxed mode lets you spot kill solutions at a glance. Expert mode requires planning multiple towers ahead, with longer Fibonacci chains needed to solve each monster's HP. The difficulty scales in logic, not just stats. ZECKENDORF MODE: THE ULTIMATE TEST Named for a real theorem, built for perfectionists. In Zeckendorf mode, each Fibonacci value can strike a monster only ONCE, every kill must be composed from different numbers, like building an integer from Fibonacci blocks without repeating a block. Your towers respect the math: no shot ever overshoots, and no tower will fire if it would leave a monster's HP impossible to finish. You get 55 lives (the next Fibonacci number after the 34 tower). You'll need them. BOSS ENCOUNTERS Survive the waves and a boss appears: massive HP, relentless movement, and a gold reward worth fighting for. In Continuous mode, every boss encounter scales higher. How long can you hold the line? FREE TO TRY FibDefense is free to play: the Fantasy and Sci-Fi worlds, all 20 waves of Classic mode, the first 8 Puzzle levels, Relaxed and Normal difficulties, and light and dark appearance — included at no cost. ONE UNLOCK. EVERYTHING. One single purchase unlocks: - All 34 Puzzle levels, on every world - All six worlds (and any future worlds we create) - Hard, Expert, and Zeckendorf difficulties - Endless wave mode - Continuous survival mode - Game speed control and adjustable wave timers No subscriptions. No ads after you unlock. Yours forever. THE MATH IS REAL Zeckendorf's theorem proves that every positive integer can be written as a sum of distinct, non-consecutive Fibonacci numbers. That's why every monster in FibDefense can always be solved — and in Zeckendorf mode, the theorem becomes the rules of the game itself: distinct numbers, exact sums, no shortcuts. The math isn't decoration. It's the foundation the entire game is built on.

350 offline math puzzles. Simple arithmetic, thoughtful moves, and no ads. Number Network turns connected numbers into a logic challenge. Choose two neighboring tiles, preview an operation, and make the numbers fit the goal. The calculation is only part of the puzzle: you also need to decide which number to change, which connection to preserve, and how to use your remaining moves. PLAN BEFORE YOU MOVE Swap two numbers, divide or multiply one by its neighbor, pour one value into another, or split an even number and give half to a connected tile. Preview the result before making the move. Undo or start over whenever you want to try a different approach. 350 LEVELS, 35 CHAPTERS Start with eight interactive lessons, then work through a campaign of cross, ring, and branching networks. Reach target numbers and solve mathematical relationships with a limited set of operations. Earn stars for efficient solutions and return to earlier levels to improve your result. HELP WHEN YOU NEED IT Use a small hint or reveal the next steps. Full solutions cost Energy once per puzzle and remain unlocked when you reopen them. Energy never blocks normal play. PLAY AT YOUR OWN PACE • Fully playable offline, with no Wi-Fi required • No ads, accounts, or third-party tracking • No puzzle timers or random outcomes • Move previews, Undo, and Start Over • Saved progress and stars on your device • Optional sound, haptics, and reduced-motion settings A quick break or a careful challenge: take your time, follow the connections, and make the numbers fit.