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Sky Islands Tower Defense: Game Design Doc

A Tower Defense game set in a Sky Islands world focused on Puzzle Rooms, where your choices change the map.

Core loop

Place and upgrade towers to survive waves, earn coins, then use them to unlock new towers built around puzzle rooms for harder maps.

Monetization plan (suggested prices)

• Special Ability Unlock: R$99–349
• Tower Skin Pack: R$49–199
• Tower Range Boost: R$199–449
• Wave Skip (1 match): R$15–35
• Coin Pack: R$25–199
• Starting Cash Boost (1 match): R$25–49

Retention hook

Weekly challenge map with modifiers, plus friend bonuses (extra rewards when playing with friends).

Scope

Team project. Big enough that a small team, or a few months solo, is realistic. Cut hard to ship a first version. Why: the twist ("where your choices change the map") is technically tricky.