Iron Blight Difficulty, Ironman, Cassette Tape and Sickness

Choose one completion goal before starting an Iron Blight challenge run. Steam lists separate achievements for Hardcore, Ironman Mode and Cassette Tape Mode; the Red Express guide covers the community-documented timed goal. Practice the route first, then check the settings and retry options available in your installed build.

What each mode is confirmed to require

Setting or mode	Confirmed achievement	Confirmed requirement
Hardcore difficulty	Blightbreaker	Complete the campaign on Hardcore difficulty.
Ironman Mode	Iron Might	Complete the campaign in Ironman Mode.
Cassette Tape Mode	Recorded	Complete the campaign in Cassette Tape Mode.
Sickness modifier	No separate Steam achievement shown	Patch notes identify Sickness as a modifier and document its behavior.

The official information does not state whether these modes can be stacked in one clear, whether they alter every rule in the same way, or which optional settings are compatible. Do not plan a one-run 100% clear around assumptions; complete a normal route first and verify the options shown by your current build.

Hardcore and Sickness changes

Patch 1.01 made the Sickness modifier inactive by default on Hardcore difficulty. Patch 1.02 changed the Hardcore damage multiplier from 0.70 to 0.75. Patch 1.03 made the effects of sickness and low health more significant, while also increasing the amount of sickness cured by vodka. In Patch 1.04, vodka's Quick Use behavior changed so it is automatically consumed only when sickness is critically high.

Those changes make old launch-week advice unreliable. If you are comparing a video to your game, check its date before copying its sickness, healing, or difficulty strategy.

Choose a goal for your next run

Your goal	What to practice or check first
Red Express: a faster completion	Follow the under-two-hour plan, rehearse mandatory keys and puzzles, and skip optional collection detours. Try the timed goal on its own before adding another challenge.
Blightbreaker: Hardcore completion	Learn the route and a compact loadout first. Check the active Sickness setting rather than copying a launch-week video.
Iron Might: Ironman completion	Confirm Ironman is selected and inspect the mode's available save and retry actions before committing. Practice the difficult transitions in a standard run first.
Recorded: Cassette Tape Mode completion	Confirm Cassette Tape Mode is active and keep a record of the selected settings and build before starting. Follow the campaign route rather than combining untested modifier settings.

These are separate planning targets. The timed requirement is community-documented, and the linked Red Express guide explains the limits of older route shortcuts. No current-build combined achievement run has been verified here.

Prepare before a challenge run

1. Complete a standard campaign route with the full walkthrough so that doors, tools, and puzzle order are familiar.
2. Read the achievement checklist and decide which confirmed completion goal you are pursuing.
3. Update Steam and review the current patch notes before starting. Patch 1.04 also added Save & Quit and changed stealth footstep and mutant melee behavior.
4. Carry the next key item, not just combat supplies. A failed return trip is expensive in any challenge setting.
5. Before leaving a long section, confirm the next route item is carried and check the available checkpoint. Keep an existing earlier checkpoint only where your current mode permits; plan around the retry actions actually shown in the menu.

Is Ironman the same as Hardcore?

No official announcement says that they are the same setting. Steam lists separate achievements for a Hardcore completion and an Ironman Mode completion, so treat them as distinct targets unless the current game's menu explicitly tells you otherwise.

What should you do if Recorded does not unlock?

Steam lists Recorded as a Cassette Tape Mode completion and its public global achievement data shows it has been earned. Patch 1.01 also states that campaign-completion achievement awarding was updated, but that announcement is not a substitute for checking every current modifier combination yourself. If a completion does not unlock, keep an existing pre-ending checkpoint where your mode permits, capture the active settings, and report the exact build through the achievement troubleshooting checklist.

Verification and sources

Mode requirements were checked on September 6, 2026 against Steam's achievement page. Sickness, Hardcore, and Quick Use changes come from the official Patch 1.01, Patch 1.02, Patch 1.03, and Patch 1.04 announcements.

The goal-selection advice and links were edited October 21, 2026 using the existing mode sources. The linked Red Express guide identifies its own version and testing limits. This revision did not retest mode rules, modifier combinations or achievement unlocks.