Following the deployment of this hotfix on Steam Early Access , developer Hakita noted that Patch 15d marks the conclusion of the immediate "duct-tape and prayers" infrastructure era. The subsequent developmental focus centers on substantial engine rewrites to handle upcoming final acts and Prime Sanctum content without degrading game performance.
Given the nature of V15d (tuning vs. content), it seems likely. The developers are polishing collision meshes and damage breakpoints to prepare for the final boss (presumably Gabriel, final form).
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This involves throwing a coin at a Malicious Face's laser to deflect it back at the enemy. It's a high-skill, high-reward defensive and offensive maneuver. ultrakill v15d top
As of April 2026, remains one of the highest-rated games on Steam, maintaining a 99% recent and overall positive rating . While there is no official "v15d" version (the game's current early access version numbering typically follows a 0.x.x format), Patch 0.15d —often referred to as the "Ultra Revamp" —brought significant technical overhauls to enemy behaviors and internal codebase in preparation for the upcoming Fraud layer. Core Review Highlights
The most immediate change veteran players noticed in is the slight adjustment to Slam Storage . Previous patches allowed for near-infinite horizontal velocity with enough setup. V15d introduces a "deceleration ceiling."
: Creates electrical tethers between targets. It delivers a devastating high-voltage discharge when hit by continuous conductor fire. Following the deployment of this hotfix on Steam
In the world of ULTRAKILL, humanity is extinct, and Hell is full. You play as
update significantly changed the menu systems, HUD, and environmental lighting. Ultimate Mod Compatibility: 15d is the gold standard for downpatching
The phrase "" appears to be a specific identifier, possibly relating to a high-score run, a configuration file, or a specific version of a community-created mod or guide for the game ULTRAKILL content), it seems likely
v1.5d is an incremental but meaningful patch: it reduces frustrating bugs, smooths combat pacing, and nudges balance toward faster, more aggressive play without altering the core Ultrakill feel. Recommended for both veterans and newcomers wanting a tighter, more reliable experience.
The stands out as one of the most critical stabilization patches in the history of Arsi "Hakita" Patala's hyper-stylized retro FPS ULTRAKILL on Steam . Released as a follow-up to major content milestones like the Full Arsenal Update, patch 15d targeted deep-seated physics inconsistencies, enemy hitboxes, and UI bugs. It effectively bridged the gap between early access experimental mechanics and the game's broader codebase modernization.
Malicious Faces and Soldiers lose their innate anti-explosion resistances when doused in gasoline, opening them up to powerful combos. This change ties the game's mechanics together, rewarding players who use their full toolkit.