Makes the acid-arena encounter focus more on timing than physics rng. Mark of Pride/Longnail work while wall-sliding
: In the speedrunning community, older versions like 1.0.3.1 are sometimes preferred because they may retain glitches or "skips" (such as certain nail-bouncing interactions) that were later patched out in the "Final" versions of the game. Essential Gameplay Mechanics
For the speedrunning community, 1.0.3.1 is a historical artifact. It was the first version where the infamous "Storage" glitch—allowing players to carry items or abilities between save files—was significantly nerfed, though not entirely removed. This changed route planning overnight. Many veteran runners consider 1.0.3.1 the last version that still captured the "wild west" feel of early Hallownest, before later patches tightened every loose screw. Hollow Knight 1.0.3.1
Standardized nail hitboxes across all spatial movement states. Fury of the Fallen multiplier raised to 1.75x Drastically amplified high-risk, low-health damage output. State Tracking In-game timer precision fixed Provided definitive speedrun and completion metrics. Mechanical Improvements and Navigation Fixes 1. Wall-Sliding Nail Hitboxes
[Jump Input Pressed] │ ▼ [Is Knight Airborne?] ─── No ──► Trigger Normal Ground Jump │ Yes │ ▼ [Monarch Wings Available?] ─── Yes ──► Trigger Double Jump Combat Rebalancing and Enemy Fixes The Uumuu Adjustment Makes the acid-arena encounter focus more on timing
The encounter with in the Teacher's Archives was significantly altered. In prior iterations, striking Uumuu while it was in its shriveled, vulnerable state caused massive, erratic player knockback. This frequently forced players into the surrounding acid pools. Team Cherry eliminated this heavy knockback and slightly raised Uumuu's maximum health pool to maintain the boss's intended difficulty without relying on physics-driven frustration. Fury of the Fallen Buff
The core of this update was the introduction of two "dream" variant bosses accessible via the Dream Nail. It was the first version where the infamous
If you are specifically trying to run this legacy version on modern hardware:
Save files from modern versions (1.4.x or 1.5.x) are NOT backwards compatible with 1.0.3.1. Trying to load a modern save will crash the game instantly.