Sector Command: Perimeter

Sector Command: Perimeter is a strategic tower defense with campaign maps, wave directives, and endless modes. You hold sectors on the Neon grid: towers on build pads, enemies on fixed paths. A campaign run is 20 waves. Between waves you take gold, upgrade, read the directive — then call the next wave when you are ready. No subscription. No ads. PLAY FREE Five campaign maps including Endless: Sector Alpha, Neon Cross, Spiral Rift, Expanse Reach, and Filter Gate. The free tier includes Basic, Sniper, Laser, Flame, Flak, and Corrosive. Difficulty Easy, Medium, or Hard. Meta upgrades (economy, base, combat) stay credit-only — credits come from how you played the run, not from gold you hoarded. CAMPAIGN Each map has its own high score and stars. Relays, tanks, and wrecks block pads until you clear them. Some sectors are multipath: multiple lanes, type filters, coverage instead of stacking one line. From a classic S-curve to Filter Gate with a tunnel, a swarm lane, and a long main. WAVE DIRECTIVES In the campaign, directives are fixed per wave — no rolling. They change composition, pace, or gold. Swarm Front, Shield Wall, Blitz March, Armor Column, Rationing: you can read the next wave, then you have to build the answer. Between waves you retool before it starts. ENDLESS AND ENDLESS+ After a campaign win you can keep going in Endless for as long as the base holds. Optional Endless+: a visible seed, a choice of two directives, its own high-score board. Same seed, same card pairs — rematch if a pick was wrong. Endless+ also needs a Hard win on that map. OPTIONAL CONTENT Unlock the remaining maps and specialty towers (Rail, Cryo, EMP, Missile) if you want — or Endless+ with seeds and directive choices. Buy them separately or cheaper as a bundle. None of it is a subscription. ENEMIES Grunts, scouts, brutes, swarm, Shielded Contact, armor, elite, and bosses. Traits force answers: splash vs swarm, energy and EMP vs shields, flak in the air, pierce vs armor. Bosses land on a campaign cadence; later waves mix traits. TACTICAL MODULES Before a run, slot up to two modules: Slow Pulse, Minefield, Flak Salvo. One charge, long cooldown — timing, not a second fire button. Sector Command: Perimeter is built for iPhone and iPad in landscape: a readable grid, a clear HUD, and short decisions between waves.