5. Diablo
In this game that ranks 5th in our list of online problem solving games for adults, each player needs to choose a profession, like a wizard, crusader, witch doctor, or barbarian. After this, they all need to come up with a plan for how to defeat the Lord of Terror. This game is full of adventure, making in interesting for players. It involves acquiring, exploring, and trading weapons. Players can exchange magic items, armor, demons, and battling hordes. It’s a great game for learning how to react fast and find new ways or exploring and finding the best solution.