Overview
- Proportional Response is one of the daily missions for heroes in the Ace Chemicals Clean Up Effort set from the Home Turf episode. It requires a combat rating of 60+.
Intro
- Ace Chemicals is producing and storing dangerous amounts of toxic waste onsite. Help Steelworks and Envirotech destroy the toxic storage tanks at the Ace Chemicals facility.
Objective
- Locate and speak to HAZMAT Higby
- Interact with storage tanks to call in a strike [0/5]; Defeat T.O. Morrow's goons guarding the storage tanks [0/8]
- Locate and speak to HAZMAT Higby
- Locate and defeat the Saturated Chemoid
- Return to the Steelworks Communication Foreman near Ace Chemicals
Combatants
- Ace Lieutenant
- Ace Security Guard
- Ace Slasher
- Chemling*
- Cryo Chemoid*
- HAZMAT Higby
- Mad Scientist
- Pyro Chemoid*
- Saturated Chemoid
- Shock Chemoid*
- \* Not direct combatants, but possible encounter
Source wiki detail links (8)
Ace Lieutenant · Ace Security Guard · Ace Slasher · Chemling · Cryo Chemoid · Mad Scientist · Pyro Chemoid · Shock ChemoidSpeak to HAZMAT Higby
- HAZMAT Higby is located at the processing area next to one of the Gotham HAZMAT trucks. He'll give you a Steelworks device to blow up T.O. Morrow's storage tanks.
Mark Tanks + Defeat Goons
- Go to the Ace Chemicals building and look for Large Freon Tanks scattered across the area. You need to interact with 5 of those tanks to complete the objective.
- Additionally, you need to defeat any 8 goons. Those are the human enemies. Chemoids and Chemlings won't count for the objective.
- Go back to HAZMAT Higby when you're done and interact with him, so he can tell you what to do next.

Source wiki detail links (1)
Large Freon TanksDefeat Saturated Chemoid
- Go southwest, you'll find the Saturated Chemoid near the bridge and surrounded by 3 Short Reactor Lab Vats. Its weapon is brawling and it has a "spitting chemical" Primary Attack similar to Chemo's. It'll also use the vats around to heal itself from time to time. Defeat it to complete the mission.
Rewards
- 581 Cash
- Daily Reward Box
- Soder Cola Extreme
Feats
- Ace Chemicals Ace: In the Ace Chemicals, complete each of the following exterior missions (10 points):; Toxic Trouble; Outbreak; Morrow's Notes; Sea Change; Proportional Response; Dirty Job; Weird Science; Random Sample; Hazardous Material; Bridge to Nowhere
- Waste Disposal: In the Ace Chemicals, defeat 100 enemies (10 points), grants title the Exterminator
Source wiki detail links (13)
Ace Chemicals Ace · Ace Chemicals · Toxic Trouble · Outbreak · Morrow's Notes · Sea Change · Dirty Job · Weird Science · Random Sample · Hazardous Material · Bridge to Nowhere · Ace Chemicals · titleFIND YOUR WAY
Edit map linksAce Chemicals
Precision: Source objective, route or mission introduction: Return to the Steelworks Communication Foreman near Ace Chemicals. No coordinates have been inferred. Location evidence.



Select a map to open the full-size image. Copies are hosted by DCUO Wiki; original sources are credited below.
Video walkthroughs
- DCUO DLC6 - Ace Chemicals Daily Mission: Proportional Response
YouTube's title explicitly names Proportional Response. Title and availability checked through YouTube metadata on 2026-10-21. Faction, route, current mechanics and timestamps have not been verified by viewing the full video.
