Comments - Prowox

The main reasons for the lack of enemies/firefights in COP seem to stem from two things (at least as far as I've noticed), few respawning stalkers (wether friendly or hostile) and a general lack of hostility towards the player outside of missions.

There are only really two factions that are hostile consitently towards the player, Monolith and Mercs. Even though you can choose to side with either Stalkers or Bandits in Zaton, and Freedom or Duty in Yanov, the faction you don't side with won't really turn hostile unless you actively try to kill them.

The solution could be to add hostile Bandit/Merc/Monolith squads that respawn somewhat frequently and roam the maps while sometimes occupying key areas, and also have larger hostile squads respawn at some quest areas some time after the quest there has been completed (for example new Mercs could spawn at the Waste Processing Plant).

Later on in the game, if the player sides with any faction, that factions enemies should also become openly hostile to the player. Friendly/Neutral squads of Stalkers/Duty/Freedom should probably also need to spawn so that more firefights will happen naturally during the game, and so that there can be hostile squads if the player sides against them.

Most of these things are admittetly how M.S.O tries to solve the "emptiness" of COP, and for the most part it works really well.

Of course implementing some kind of Faction War like system would also help make the maps more lively.

Since this mod edits the simulation_objects_props.ltx file, which controls what factions can be found where, it's not directly compatible. But you can try to merge both versions of the files if you think you know what you're doing, won't guarantee that it works though.