Overview

• Valve initially approved the Classic Offensive mod through Steam Greenlight in 2017 but reversed its stance after eight years of development.
• The mod was rejected from Steam in January 2025 and later barred from release through a cease and desist under Valve's derivative content rules.
• The Classic Offensive team denies allegations of using leaked Source engine code, stating their project adhered to legal guidelines.
• Developers have launched a website to archive the mod's history and warn other creators about shifting modding policies within Valve's ecosystem.
• The cancellation has raised broader concerns about Valve's evolving stance on modding and its impact on community-driven projects.