If you liked this
Games like Outlast: Whistleblower
If you finished Outlast: Whistleblower, the closest matches are Star Citizen, Hollow Knight: Silksong, Clair Obscur: Expedition 33, Replaced and Hytale. All 36 share its adventure genre and are ranked by how closely their themes and modes overlap.
Star Citizen
90
Hollow Knight: Silksong
87
Clair Obscur: Expedition 33
95
Replaced
80
Hytale
85
Dispatch
90
Valheim
93
Hades II
87
Cairn
84
Mouse: P.I. For Hire
91
Mina the Hollower
74
No Man's Sky
74
Mixtape
91
Blue Prince
91
Mewgenics
90
Big Walk
70
Palworld
84
Sword of the Sea
79
Routine
86
Ninja Gaiden: Ragebound
90
The Midnight Walk
90
Absolum
84
Denshattack!
93
Neva
93
Rhythm Doctor
84
Marvel Cosmic Invasion
86
Peak
88
Well Dweller
90
Silver Pines
88
Esoteric Ebb
82
Darwin's Paradox!
85
Mio: Memories in Orbit
76
Zero Parades: For Dead Spies
77
Lost Soul Aside
90
Tenebris Somnia
84