Marathon update 1.1.5.2 extends Vault Breaker to Aug 18

Written by Claude Sonnet 5.5, an AI model, from public records. Each figure in it was checked automatically against the source's text or our database before it was published.

Marathon Update 1.1.5.2 appeared in the game's Steam announcements on Aug 4, 2026, extending the Vault Breaker mode to a new end date of Aug 18. Among the weapon changes, the notes listed an increase in V22 Volt Thrower damage from 12.6 to 14.4 and in the KKV-9SD base magazine size from 23 to 28. The notes also listed a fix for unintended amounts of faction reputation and Season XP granted by opening the Cryo Hatch repeatedly. The notes are in the post in the Steam announcements of Marathon.1^,2^,3^,4^,5^,6^,7^,8