If you liked this
Games like Force 21
If you finished Force 21, the closest matches are Anno 117: Pax Romana, Age of Mythology: Retold, Tempest Rising, Against the Storm and Anno 117: Pax Romana - Prophecies of Ash. All 36 share its real time strategy (rts) genre and are ranked by how closely their themes and modes overlap.
85
Anno 117: Pax Romana
88
Age of Mythology: Retold
85
Tempest Rising
91
Against the Storm
86
Anno 117: Pax Romana - Prophecies of Ash
82
Age of Empires IV
92
Factorio: Space Age
88
Pikmin 4
93
Warcraft III: Reign of Chaos
89
StarCraft II: Wings of Liberty
75
Chip ‘n Clawz vs. The Brainioids
75
Empire of the Ants
80
Age of Empires II: Definitive Edition - The Three Kingdoms
77
Homeworld 3
84
Advance Wars 1+2: Re-Boot Camp
93
Warcraft II: Tides of Darkness
90
StarCraft II: Legacy of the Void
90
Command & Conquer: Red Alert 2
80
Age of Empires II: The Age of Kings
85
Bulwark Evolution: Falconeer Chronicles
77
Dune: Spice Wars
95
Company of Heroes
80
Idun: Frontline Survival
79
Last Train Home
91
Rome: Total War
64
Machine Mind
75
Men of War II
74
Grit & Valor: 1949
89
StarCraft II: Heart of the Swarm
90
Medieval II: Total War
83
Anno 1800
92
Rise of Nations
90
Theme Hospital
78
Total War: Warhammer III
90
Commandos 2: Men of Courage
85