Open-World Narrative · Guides & deep dives

0001: Pin Unreal Engine 5.5 LTS

V5 is scoped as a full open-world UE project with large binary content, networked runtime systems, and platform-specific cooks.

3sections1 minread
Markdown source
On this page

Status: Accepted

Date: 2026-05-25

Context#

V5 is scoped as a full open-world UE project with large binary content, networked runtime systems, and platform-specific cooks. The project needs a stable launch engine so gameplay code, platform certification, middleware, and binary content stay aligned.

Decision#

V5 pins the launch branch to Unreal Engine 5.5 LTS. V5/ue/V5.uproject uses EngineAssociation 5.5; engine upgrades during launch development require a new decision record and migration plan.

Consequences#

  • Tooling and commandlets target UE5.5 paths.
  • Plugin certification is assessed against UE5.5.
  • Platform cooks use UE5.5 as their compatibility baseline.