Ruinarch

Ruinarch is a simulation sandbox game where you create obstacles and cause conflicts in procedurally generated fantasy worlds. Inspired by story generator games like Rimworld and Dwarf Fortress, weaving tales of both anguish and humor is central to Ruinarch’s gameplay. The game gives you all the infernal tools you'll need to toy with people's lives and relationships.

There are many ways to be evil. Choose from three overlord Archetypes - each one provides you with a different playstyle. Do you want to focus on sheer destruction or are you into a more subtle puppetmaster approach? You can then customize it further by adding optional abilities to suit your own preferences.## You can experiment by combining destructive spells.

The most straightforward way to wipe out villagers is to simply cast powerful spells like Meteors, Earthquakes, Fire Balls, Lightning and more. But what happens when you hurl a meteor at a poisonous puddle? Poisonous meteor explosions, that's what! And that's just one of the many nefarious ways that you can combine elemental interactions to create your personalized cocktail of destruction!##

## You can activate artifacts.

Sometimes, the procedurally generated world will have some powerful artifacts for you to play with. If you find a Necronomicon, gift it to an evil villager to turn him into a Necromancer and let him terrorize the villagers himself. But be careful because some artifacts can also be used against you!## You can afflict villagers with flaws.

Sure, you could just destroy the world with ice and fire, but the real fun begins when you meddle with villager lives to put them into compelling and tragic situations! Afflict the local hero with Lycanthropy and watch as his once loyal friends turn on him when the full moon rises. Afflict an annoying husband with Unfaithfulness and then watch the fireworks once you tell his wife of his misdeeds.##

## You can breed and spawn monsters.

You can seize a roaming monster and then breed it in your Kennel. This will allow you to summon a copy of it anywhere in the world. Your corrupted versions behave differently from their wild counterparts as they have been bred to perform very specific functions.## You can spread malicious info.

Your Eye Structure allows you to gather information about major events that occur in the world. You've seen a Knight steal a Shaman's Potion? Store it as an Intel and then tell the Shaman about it!##

## You can summon lesser demons.

There are many demons in the netherworld ready to assist you. Wrath Demons can be used to invade villages while Sloth Demons can defend your demonic structures. In total, there are seven different demon types - each one representing a deadly sin. But be wary! Once they perish, you have to wait until they fully recuperate before summoning again.## You can brainwash folks into becoming cultists.

Seize a villager and drop it on your Defiler. There, you can start to brainwash it. If successful, it will return to its village as a secret cultist who will quietly worship and aid you.##

## You can torture people.

You can build a Prison and incarcerate villagers. If necessary, you can torture them in ridiculous ways to afflict them with random flaws. Perhaps someone will have a mental breakdown and become a Serial Killer when it gets back to its village?## You can start a zombie apocalypse.

You can afflict a peasant with a Zombie Virus. When it dies, it will reanimate at nightfall as a Zombie. Other villagers that it attacks may also contract the virus. Soon, the entire village will be filled with nothing but shambling zombies.##

## You can start an epidemic.

Too soon? But, yes you can.

Source: Steam Store Description