Expression Games has released Hell Let Loose Hotfix 1.5.2 (Version 1.013.000), primarily targeting technical performance through the introduction of AMD FSR 4.1 support and critical server-side replication fixes. The update, launched on September 29, 2026, across PC, PlayStation 5, and Xbox Series X/S, prioritizes hardware optimization and networking stability over content additions.

Hardware Optimization and AMD FSR 4.1

The headline technical addition in Hotfix 1.5.2 is AMD FSR 4.1 support, now available for players using Radeon RX 7000 Series GPUs or newer hardware. This update introduces AI-driven upscaling designed to improve frame rates and visual clarity on modern RDNA 3 architectures. For users on older hardware, the developer blog reports that FSR 4.1 support for Radeon RX 6000 Series GPUs is currently planned for a 2027 rollout.

PC players should note a specific requirement upon first launching the update: the game now requires the completion of shader caching at the start screen. Skipping or interrupting this process can lead to client crashes during gameplay, as the system pre-compiles assets to prevent stuttering during matches.

Server Stability and the Iris Replication System

This hotfix addresses deep-seated networking issues within the Iris replication system, the specific Unreal Engine framework used to synchronize high-player-count data. These changes are intended to resolve inconsistencies with:

• Player Spawns: Reducing instances where spawn points fail to register or update correctly.
• HQs and Vehicles: Improving the reliability of vehicle physics and HQ status across the server to prevent “ghosting” or desync.

The update also resolves a visual Level of Detail (LOD) bug involving tree rendering. Previously, trees would occasionally remain as 2D impostor models (flat sprites) even when players were in close proximity. The fix ensures that high-quality 3D models load correctly as players approach foliage, maintaining visual immersion in dense environments.

Platform Fixes and Quality of Life

For console and multi-platform players, the 1.5.2 update includes several stability improvements:

• PS5 Data Protection: Added safeguards to the PlayStation 5 version to prevent rare instances of save data loss.
• Settings Retention: Resolved a bug where signing out of Epic Online Services (EOS) would trigger a full reset of all in-game settings.
• VRAM Management: General optimizations to reduce VRAM overhead, which helps maintain stability during long-duration matches on maps with heavy asset density.

Detailed technical logs for this update can be tracked via SteamDB for PC-specific file changes.