Not exactly. “USSEP 1.6.318” is a shorthand for any USSEP version that requires game runtime 1.6.318 . The first such version was 4.2.6a . Later USSEP versions (4.2.7, 4.3.x, etc.) also require 1.6.318 or higher, but they include additional fixes. For the launch of the Anniversary Edition, 4.2.6a is the correct baseline.
Even in 2021, new bugs were being discovered in a decade‑old game. The version history of USSEP lists many corrections that affect gameplay, quests, and NPCs. Recent examples from later versions illustrate the kind of work that was already underway in the 4.2.6x branch: unofficial skyrim special edition patch 1.6.318
The USSEP itself does not include fixes for the 70 extra paid DLCs. Those are handled by separate patches created by Garthand (the “Unofficial Skyrim Creation Club Content Patches”). However, USSEP 1.6.318’s master‑file structure does not conflict with those extra DLCs; they can coexist. Not exactly
Your plugin list adhere to the following order to function correctly: Skyrim.esm -> Update.esm -> Dawnguard.esm -> HearthFires.esm -> Dragonborn.esm -> ccBGSSSE001-Fish.esm -> ccQDRSSE001-SurvivalMode.esl -> ccBGSSSE037-Curios.esl -> ccBGSSSE025-AdvDSGS.esm -> Unofficial Skyrim Special Edition Patch.esp Later USSEP versions (4
The primary goal of the patch is to fix bugs left over in the official game. It does this without changing core gameplay mechanics, balancing, or adding new content. Instead, it ensures that the game runs exactly as the developers intended, but without the crashes and broken quests. Why Version 1.6.318 Matters
in 1.6.318 to the newer 1.6.1130+ updates.
