A siege comes whether you are ready or not. Stick Fortress gives you the interval between enemy waves to build walls, hire stickman defenders, and allocate the resources that determine what your garrison can actually absorb. Spend too little between waves and a siege breaches your outer wall before your defenders can respond. Spend too aggressively on fortifications and you run out of gold for the soldiers who need to fill the gaps. The push-pull between construction and recruitment is the game's central tension, and it rarely resolves cleanly.
When a siege begins, direct control shifts to positioning your defenders and triggering their abilities at the right moments — but the foundation of that combat is entirely determined by what you built before the horn sounded. A well-staffed outer wall with reinforced gates handles the same siege that overwhelms an underfunded defense with superior soldiers but no structure to protect them. Stick Fortress forces you to think in both modes simultaneously: the strategic layer of construction and the tactical layer of real-time combat, neither of which works without the other.
Enemy sieges in Stick Fortress escalate in ways that specifically target the upgrades you haven't bought. Early waves favor ranged defense; later waves bring ladder units that bypass walls entirely. The game doesn't announce what's coming — it expects you to observe each wave's composition and adjust your investments accordingly. Players who build the same fortress every game will eventually find a wave that their standard layout cannot handle. The ones who adapt, redirecting resources to patch specific vulnerabilities rather than grinding the same upgrades, are the ones who hold the longest.