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The Outlast Trials Adds Chemical Leak Event, Two New MK-Challenges
A limited-time toxic-gas event and a pair of new challenges expand the Therapy roster through early October.
Distilled Sep 11, 2026·1 min read·source confidence88%
Murkoff's latest update to The Outlast Trials arrives with a time-limited event built around environmental hazard rather than the usual pursuit of test subjects.
What changed
- Chemical Leak Limited-Time Event runs from September 8 (10 AM ET) through October 6 (10 AM ET). A toxic gas fills each Trial area; players must locate and shut off valves to clear it.
- Chemical Leak Limited-Time Catalog accompanies the event. Players spend earned Event Tokens on exclusive rewards. The catalog disappears when the event ends, and any unspent tokens are forfeited.
- New MK-Challenge: Change the Program — framed around spreading Murkoff's manufactured truth.
- New MK-Challenge: Fund the Campaign — cast players as an instrument of institutional violence.
- Various bug fixes and improvements, plus balancing updates to Invasion and Escalation modes and new quality-of-life options.
The valve-hunting mechanic gives the Chemical Leak event a distinct moment-to-moment texture compared to standard runs, while the token economy creates a firm deadline for anyone chasing the exclusive catalog rewards.
Distilled from 1 source
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