This is currently the most common context for a "TRX zip" download. It is an open-source project aimed at porting and enhancing the classic Tomb Raider engine for modern systems. Official TRX Releases on GitHub .
These zip files typically contain the compiled binaries for Windows or Linux. For example, TRX-1.5-Windows-tr1.zip includes the core engine files for Tomb Raider 1. Download TRX zip
In a software development context, a .trx file is a Visual Studio Test Results file. This is currently the most common context for