Games like Into the depths below
Games like Into the depths below include Clair Obscur: Expedition 33, Our Adventurer Guild, The Elder Scrolls IV: Oblivion Remastered, Baldur's Gate 3, and Legend of Grimrock. We matched them by the tags players give Into the depths below on Steam (Character Customization, Turn-Based Tactics, Dungeon Crawler, First-Person, and Party-Based RPG): closest matches first, and among equally close ones the better-known games.

Clair Obscur: Expedition 33
Shared: RPG · Turn-Based Combat · Exploration

Our Adventurer Guild
Shared: Turn-Based Tactics · Character Customization · Party-Based RPG

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

Baldur's Gate 3
Shared: Character Customization · RPG · Turn-Based Combat

Legend of Grimrock
Shared: Dungeon Crawler · RPG · Party-Based RPG

Low Magic Age
Shared: Turn-Based Tactics · Party-Based RPG · Dungeon Crawler

Legend of Grimrock 2
Shared: Dungeon Crawler · First-Person · RPG

XCOM 2
Shared: Character Customization · Turn-Based Tactics · RPG

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

Wizardry 8
Shared: Dungeon Crawler · Party-Based RPG · RPG

Wildermyth
Shared: Character Customization · Turn-Based Tactics · Party-Based RPG

Wizardry: Proving Grounds of the Mad Overlord
Shared: Dungeon Crawler · Party-Based RPG · Character Customization

FINAL FANTASY
Shared: RPG · JRPG · Party-Based RPG

Touhou Artificial Dream in Arcadia
Shared: Dungeon Crawler · First-Person · RPG

Starfield
Shared: Character Customization · RPG · First-Person

Labyrinth of Touhou Tri -The Dreaming Girls & The Mysterious Orbs-
Shared: Character Customization · Party-Based RPG · RPG

Bug Fables: The Everlasting Sapling
Shared: Party-Based RPG · Exploration · RPG

Hogwarts Legacy
Shared: Character Customization · RPG · Exploration

Potato Flowers in Full Bloom
Shared: Dungeon Crawler · RPG · Party-Based RPG

Etrian Odyssey III HD
Shared: Dungeon Crawler · RPG · JRPG

Stellar Tactics
Shared: Turn-Based Tactics · Dungeon Crawler · Exploration

Etrian Odyssey HD
Shared: Dungeon Crawler · RPG · First-Person

Solasta: Crown of the Magister
Shared: Character Customization · RPG · Fantasy

Wizardry: The Five Ordeals
Shared: Dungeon Crawler · RPG · Character Customization