If you liked this
Games like Happy Diet
If you finished Happy Diet, the closest matches are Mewgenics, Satisfactory, Anno 117: Pax Romana, Shapez 2: Factory and Timberborn. All 36 share its simulator genre and are ranked by how closely their themes and modes overlap.
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Mewgenics
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Satisfactory
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Anno 117: Pax Romana
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Shapez 2: Factory
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Timberborn
Totally Accurate Battle Simulator
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Sid Meier's Civilization VII
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Welcome to Elderfield
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Raccoin: Coin Pusher Roguelike
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Farthest Frontier
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News Tower
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Frostpunk 2
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The Hundred Line: Last Defense Academy
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Two Point Museum
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Go-Go Town!
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Caves of Qud
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Xenonauts 2
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Cult of the Lamb: Woolhaven
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Endless Legend 2
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Everything Is Crab
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Restaurats
82
Corsair Cove
91
Against the Storm
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Quarantine Zone: The Last Check
80
Buckshot Roulette
87
The Jackbox Party Pack 11
86
Anno 117: Pax Romana - Prophecies of Ash
85
Back to the Dawn
92
Factorio: Space Age
81
Brigandine Abyss
81
Terra Invicta
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Madden NFL 26
78
Football Manager 26
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Cloverpit
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Madden NFL 27
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