Games like Redaxium
Games like Redaxium include Baldur's Gate 3, Fallout: New Vegas, Wasteland 3, Warhammer 40,000: Rogue Trader, and Disco Elysium - The Final Cut. We matched them by the tags players give Redaxium on Steam (CRPG, Point & Click, Character Customization, RPG, and 3D): closest matches first, and among equally close ones the better-known games.

Baldur's Gate 3
Shared: Character Customization · RPG · CRPG

Fallout: New Vegas
Shared: RPG · Post-apocalyptic · Open World

Wasteland 3
Shared: CRPG · Character Customization · RPG

Warhammer 40,000: Rogue Trader
Shared: CRPG · RPG · Character Customization

Disco Elysium - The Final Cut
Shared: RPG · Point & Click · CRPG

Fallout 4
Shared: RPG · Post-apocalyptic · Open World

Tainted Grail: The Fall of Avalon
Shared: RPG · Character Customization · First-Person

Fallout 76
Shared: RPG · Post-apocalyptic · Open World

Fallout 3
Shared: RPG · Post-apocalyptic · First-Person

The Elder Scrolls IV: Oblivion Remastered
Shared: RPG · Character Customization · First-Person

ZERO PARADES: Director's Cut
Shared: RPG · CRPG · Character Customization

UnderRail
Shared: CRPG · RPG · Post-apocalyptic

Starfield
Shared: RPG · Character Customization · First-Person

Fallout: A Post Nuclear Role Playing Game
Shared: RPG · Post-apocalyptic · CRPG

Lucid Blocks
Shared: Surreal · Horror · First-Person

Dread Delusion
Shared: RPG · First-Person · 3D

ATOM RPG: Trudograd
Shared: CRPG · RPG · Post-apocalyptic

The Elder Scrolls IV: Oblivion® Game of the Year Edition (2009)
Shared: RPG · First-Person · Character Customization

江湖十一
Shared: RPG · CRPG · Open World

Pathfinder: Kingmaker - Enhanced Plus Edition
Shared: CRPG · RPG · Character Customization

R.E.P.O.
Shared: Horror · First-Person · 3D

Encased: A Sci-Fi Post-Apocalyptic RPG
Shared: CRPG · RPG · Post-apocalyptic

Baldur's Gate II: Enhanced Edition
Shared: CRPG · RPG · Character Customization

Fallout 2: A Post Nuclear Role Playing Game
Shared: RPG · Post-apocalyptic · CRPG