You can change the game language via GOG GALAXY by navigating to Manage installation -> Configure -> Language .
For more exhaustive step-by-step level guides, you can refer to the comprehensive GameFAQs Walkthrough or visual 100% Path of Evil Longplays on YouTube. Guide :: Farming: An Overlordly way to gather Resources overlord-raising-hell-gog
Resources like Gold and Life Force (the "currency" used to spawn minions) are vital for upgrading your and gear. You can change the game language via GOG
Essential support units. They are the only minions that can swim and resurrect fallen comrades, though they are very weak in direct combat. Campaign Strategy & The "Abysses" Essential support units
Successfully conquering the realm requires mastering your four distinct Minion tribes:
Once a hero is defeated in the base game, an Abyss Portal opens in their respective realm. These are challenging endgame dungeons where you must banish the former rulers to their personal hells.
If the game fails to launch, try running Config.exe as an administrator or setting the compatibility mode for Overlord.exe to Windows 7 in the installation folder.