Games like Avium
Games like Avium include Fallout 4, Warframe, Grand Theft Auto V Legacy, Red Dead Redemption 2, and Fallout: New Vegas. We matched them by the tags players give Avium on Steam (Action RPG, Third-Person Shooter, Open World, Story Rich, and Hero Shooter): closest matches first, and among equally close ones the better-known games.

Fallout 4
Shared: Open World · Post-apocalyptic · Story Rich

Warframe
Shared: Action RPG · Third-Person Shooter · Looter Shooter

Grand Theft Auto V Legacy
Shared: Open World · Third-Person Shooter · Shooter

Red Dead Redemption 2
Shared: Open World · Story Rich · Shooter

Fallout: New Vegas
Shared: Open World · Story Rich · Post-apocalyptic

Tom Clancy’s The Division™
Shared: Open World · Third-Person Shooter · Looter Shooter

Cyberpunk 2077
Shared: Open World · Story Rich · Cyberpunk

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

Hogwarts Legacy
Shared: Open World · Story Rich · Action RPG

Starfield
Shared: Open World · Story Rich · Action RPG

Tom Clancy’s The Division® 2
Shared: Open World · Third-Person Shooter · Looter Shooter

The Elder Scrolls IV: Oblivion Remastered
Shared: Open World · Action RPG · Story Rich

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

Far Cry® 5
Shared: Open World · Action-Adventure · Story Rich

EVERSPACE™ 2
Shared: Open World · Action RPG · Shooter

Rise of the Tomb Raider™
Shared: Open World · Story Rich · Third Person

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

The Last of Us™ Part I
Shared: Story Rich · Third-Person Shooter · Action-Adventure

Grand Theft Auto V Enhanced
Shared: Open World · Shooter · Third Person

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

Tainted Grail: The Fall of Avalon
Shared: Open World · Action RPG · First-Person

The First Descendant
Shared: Third-Person Shooter · Looter Shooter · Action RPG

OUTRIDERS
Shared: Third-Person Shooter · Looter Shooter · Shooter

Max Payne 3
Shared: Third-Person Shooter · Story Rich · Shooter