Nightmare dimension: the complete survival guide

Act II doesn't just add enemies — it changes the rules underneath you. Organic targets resist what mechanical ones feared, flyers skip your ground game, and the Horror faction punishes lazy build recycling harder than anything in the campaign.

The new rulebook

Nightmare's Horror faction inverts Steamcrust's math. Where crustacean armor gated kinetic damage, organic horrors resist conventional types and demand toxic stacking and incendiary pressure. Flying units appear from mission 15 and never leave — anti-air stops being a specialty pick and becomes standard doctrine. And the phase-immune enemies (Cactus Ghost Flats is the warning label) flatly ignore damage types that don't match their phase state. Rebuild your assumptions before the dimension rebuilds your grid.

Mission-by-mission threats

Suburbia Breach teaches resists gently. Eyeball Avenue forces anti-air. The Mortis Mall is a gift — overlapping chokepoints that make defense feel illegal. Graveyard Shift introduces surge economics where the cloning bay becomes a second resource bar. Cactus Ghost Flats punishes single-type builds, Gunclam Gulch punishes exposed heroes, and the Warped Fairground punishes planning itself with rotating lane logic. Each mission is a lesson; skip one and the next grades it for you.

The road to the shark

Missions 21-25 accelerate toward the finale: Squid Cycle Speedway tests slow-field coverage against burst-speed waves, Wartoise Wastes demands Saboteur armor-strips, and Jaws of the Sky is the payoff — the flying zombie shark fight the whole act teaches toward. The Overmind Rift then stacks both factions on one grid, which is the campaign's honest final exam: every damage type, every role, every habit. Zero Hour is the defense that makes it count. See the mission board for the full sequence and linked guides per level.