Derail Valley Build 97 Apr 2026

1. Executive Summary Build 97 was not a typical content update; it was a complete refactoring of the game’s core systems. The developers (Altfuture) rewrote the game from the ground up to address long-standing technical debt, paving the way for future expansions (including VR improvements and the Simulator expansion). While it introduced fewer new locomotives than previous updates, it fundamentally changed how the game performs, looks, and feels.