How to finish Hull Rupture wave 20

Milestone rates

A plan for the next Classic attempt

• Keep the production chain powered before buying more rooms: staff energy production, maintain population, and compare current per-minute output in Info Mode.
• Spend on a turret kit that matches the resources you already produce, or expand production before committing to a more expensive recipe. Devlog 2 presents those as the two economic approaches to defense.
• When choosing a hull block, allow room for existing kits. Put long-range turrets at exposed corners and short-range turrets in enclosed approaches, following devlog 4.
• Build a longer approach from the upper-left boss landing area to the airlock. Keep airlock units as the final safety net, as the September defense rebalance describes.

The boss

The 14 Sep 2026 announcement says the final boss needs a lot of good guns. Devlog 4 places that boss at the top-left of the hull, farthest from the airlock. A longer path keeps several bosses from stacking on the airlock at once.

Devlog 3 described planned guarded-location waves as extra to the Classic 20 and reserved for higher difficulties. This is the announced design; the post does not document final release tuning.

Steam player reviews describe being flooded late and running out of turrets. Treat those as player reports; the placement advice above comes from the studio devlog.