Games like 7821 Akuji
Games like 7821 Akuji include Iron Lung, The Cabin Factory, Firewatch, Who's at the door?, and The Exit 8. We matched them by the tags players give 7821 Akuji on Steam (Immersive Sim, Submarine, Simulation, Underwater, and Walking Simulator): closest matches first, and among equally close ones the better-known games.

Iron Lung
Shared: Submarine · Underwater · Horror

The Cabin Factory
Shared: Immersive Sim · Walking Simulator · Horror

Firewatch
Shared: Adventure · Walking Simulator · Story Rich

Who's at the door?
Shared: Simulation · Immersive Sim · Walking Simulator

The Exit 8
Shared: Immersive Sim · Walking Simulator · Horror

Kiosk
Shared: Immersive Sim · Horror · Simulation

MiSide
Shared: Story Rich · 3D · First-Person

PC Building Simulator
Shared: Immersive Sim · Simulation · 3D

Platform 8
Shared: Simulation · Walking Simulator · Adventure

BioShock™ Remastered
Shared: Story Rich · Horror · First-Person

What Remains of Edith Finch
Shared: Walking Simulator · Story Rich · First-Person

Happy's Humble Burger Farm
Shared: Immersive Sim · First-Person · Horror

IRON NEST: Heavy Turret Simulator
Shared: Simulation · Immersive Sim · 3D

Under The Waves
Shared: Underwater · Adventure · Submarine

Still Wakes the Deep
Shared: Walking Simulator · Horror · First-Person

Fresh Start Cleaning Simulator
Shared: 3D · Simulation · First-Person

Layers of Fear (2016)
Shared: Walking Simulator · Horror · First-Person

Farming Simulator 25
Shared: Simulation · 3D · First-Person

Killer Frequency
Shared: Simulation · Adventure · Horror

Electrician Simulator
Shared: Immersive Sim · Simulation · First-Person

There Exists Nobody
Shared: Immersive Sim · Walking Simulator · 3D

Internet Cafe Simulator 2
Shared: Simulation · 3D · Immersive Sim

Subnautica
Shared: Underwater · Horror · Adventure

Prey
Shared: Immersive Sim · Horror · First-Person