Hearts.of.iron.iv (95% ESSENTIAL)

Strategy veterans, history buffs (with a flexible view of history), multiplayer groups, mod enthusiasts. Worst for: Casual players, people who dislike spreadsheets, those seeking fast-paced RTS action.

9/10 (with DLC) | 6/10 (base game only) Hours to become competent: 50–100 Hours for mastery: 1000+ hearts.of.iron.iv