For players looking to update their game to version 1.13, safer and more reliable methods exist than using a random "Free .rar" link found on the open web:
The filename you mentioned, Jagged Alliance Back In Action Patch 1.13 E.rar , likely refers to a archived version of the English ("E") update. If you are downloading this from an unofficial third-party site rather than a verified platform like Steam or GOG, keep the following in mind: Jagged Alliance Back In Action Patch 1.13 E.rar -FREE-
If you’d like a guide on installing legitimate mods for Jagged Alliance games or a comparison of Back In Action vs. Jagged Alliance 2 v1.13, I’d be happy to help with that instead. For players looking to update their game to version 1
Downloading compressed files from unverified third-party "free download" sites carries significant risks: 📈 Why Use This Patch
Even with newer entries like Jagged Alliance 3 on the market, Back in Action remains a unique entry because of its real-time-with-pause mechanics. For players who prefer a fluid flow of battle over grid-based movement, a modded version of BiA offers a sweet spot between tactical planning and cinematic action.
JA2/1 Metavira - The Official Information - Bear's Pit Forum
Some versions require deleting the "shader cache" in the game options before launching. 📈 Why Use This Patch?