Technical issues in Heroes IV.

The problem is that the game itself has a certain slowdown. Although it was removed in later versions, it still manifests itself a little – if you play for a long time, the game starts to lag slightly – as if fatigue accumulates. And no amount of memory clearing helps – you have to restart the game. However, on the other hand, there is a certain advantage to this (although I hadn't thought about it before) – the computer reminds you that it's time to stop playing and take a break.