This involves modifying the game executable. Do this at your own risk, though it is generally considered safe and standard practice for this game.
Here is a step-by-step guide to fixing or mitigating this issue. cossacks 3 out of memory
Sometimes the OOM error is caused by corrupted game files failing to load textures properly, leaking memory in the process. This involves modifying the game executable
Let’s be blunt: Cossacks 3 is a 32-bit executable. In 2025 (or even 2016, when it launched), that’s like bringing a musket to a drone fight. The game can only address ~3.5GB of RAM, regardless of how much you have. Once you hit that wall — usually during a 7-player match with 8,000 units on screen — the game freezes, stutters, and dies with the infamous “Out of Memory” error. Sometimes the OOM error is caused by corrupted
Lower textures from "Very High" to "High." The visual difference is often negligible, but the memory savings are significant.
Delete the contents (the game will regenerate them on the next launch). 5. Verify Game Files