Permanent Modes and Resource Farms
Episode 17 Extreme Mode H17-4
Complete the final listed Episode 17 Extreme operation and claim its available clear rewards.
WHERE & HOW TO FARM
Episode 17 Extreme Mode H17-4
Episode 17 → Extreme Mode → H17-4.
Before you go
- Episode 17 access and Extreme Mode unlocked.
- H17-4 available after the required prior Extreme progression.
- Squad appropriate for the displayed map and enemies.
- Practice Plans if you need to rehearse the strategy.
Farming steps
- Open Extreme Mode and select H17-4 after it becomes available.
- Study the enemy preview, map layout, and clear condition.
- Set a squad to address those specific threats and protect the objective.
- Use a Practice Plan to test deployment timing or operator placement.
- Enter H17-4 and complete the displayed objective.
- Claim the result screen and verify the operation is marked cleared.
- Review the Extreme list for any remaining completion objective.
- The final stage still requires its own preview-based preparation; do not assume earlier maps’ solutions transfer.
- Check in-game rewards rather than estimating them from the stage number.
Repeat, collect and use
The clear and its first-clear rewards are one-time; repeat only for an uncompleted displayed goal or personal challenge.
Common mistakes
- Attempting H17-4 before the stage list unlocks it; follow chapter progression.
- Entering with a generic squad without reading the objective; tailor your team to the preview.
- Treating a challenge clear as a routine material farm; choose a permanent farm if materials are the goal.
When to stop or switch
Stop once H17-4 is cleared and any displayed completion goal you wanted is claimed.
Sources & fact checks
What you can get here
Open a guide to find other locations and see what the item is used for.