Games like Rusted Sea
Games like Rusted Sea include Fallout 4, Black Myth: Wukong, Fallout: New Vegas, Hogwarts Legacy, and Starfield. We matched them by the tags players give Rusted Sea on Steam (Action-Adventure, Underwater, Post-apocalyptic, Action RPG, and Exploration): closest matches first, and among equally close ones the better-known games.

Fallout 4
Shared: Post-apocalyptic · Exploration · Adventure

Black Myth: Wukong
Shared: Action RPG · Action-Adventure · Story Rich

Fallout: New Vegas
Shared: Post-apocalyptic · Exploration · Story Rich

Hogwarts Legacy
Shared: Adventure · Exploration · Action-Adventure

Starfield
Shared: Exploration · Action-Adventure · Sci-fi

STAR WARS Jedi: Fallen Order™
Shared: Action-Adventure · Story Rich · Exploration

God of War Ragnarök
Shared: Action-Adventure · Adventure · Action RPG

DEATH STRANDING DIRECTOR'S CUT
Shared: Story Rich · Post-apocalyptic · Adventure

Tomb Raider Game of the Year
Shared: Adventure · Action-Adventure · Story Rich

Assassin's Creed® Origins
Shared: Action-Adventure · Adventure · RPG

The Elder Scrolls IV: Oblivion Remastered
Shared: Adventure · Exploration · Action RPG

Rise of the Tomb Raider™
Shared: Adventure · Action-Adventure · Exploration

STAR WARS Jedi: Survivor™
Shared: Action-Adventure · Adventure · Story Rich

S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition
Shared: Post-apocalyptic · Exploration · Story Rich

FAR: Lone Sails
Shared: Post-apocalyptic · Adventure · Exploration

Eastward
Shared: Action RPG · Adventure · Story Rich

Fallout 3
Shared: Post-apocalyptic · Exploration · Adventure

ENSLAVED™: Odyssey to the West™ Premium Edition
Shared: Post-apocalyptic · Adventure · Action-Adventure

Crimson Desert Enhanced
Shared: Exploration · Adventure · Action-Adventure

God of War
Shared: Adventure · Story Rich · Action

Hyper Light Breaker
Shared: Action-Adventure · Adventure · Action RPG

Assassin's Creed® Odyssey
Shared: Action-Adventure · Exploration · RPG

Gothic 1 Remake
Shared: Exploration · Adventure · Action RPG

The Witcher 3: Wild Hunt — Remastered
Shared: Story Rich · Adventure · RPG