Games like Letalis
Games like Letalis include Clair Obscur: Expedition 33, FINAL FANTASY, Cassette Beasts, FINAL FANTASY II, and FINAL FANTASY RESONANCE. We matched them by the tags players give Letalis on Steam (RPG, Creature Collector, Turn-Based Combat, Party-Based RPG, and Nonlinear): closest matches first, and among equally close ones the better-known games.

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

FINAL FANTASY
Shared: RPG · Turn-Based Combat · Party-Based RPG

Cassette Beasts
Shared: Creature Collector · Turn-Based Combat · Party-Based RPG

FINAL FANTASY II
Shared: RPG · Party-Based RPG · Turn-Based Combat

FINAL FANTASY RESONANCE
Shared: RPG · Turn-Based Combat · JRPG

Digimon Story Time Stranger
Shared: RPG · Creature Collector · Party-Based RPG

Monster Sanctuary
Shared: Creature Collector · Turn-Based Combat · Exploration

FINAL FANTASY IV
Shared: RPG · Party-Based RPG · Exploration

Chained Echoes
Shared: RPG · Turn-Based Combat · JRPG

Felvidek
Shared: RPG · Turn-Based Combat · JRPG

Darkest Dungeon®
Shared: Turn-Based Combat · RPG · Dungeon Crawler

Fear & Hunger 2: Termina
Shared: RPG · Party-Based RPG · JRPG

Coromon
Shared: Creature Collector · Turn-Based Combat · Exploration

Metaphor: ReFantazio
Shared: RPG · Turn-Based Combat · JRPG

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

OCTOPATH TRAVELER II
Shared: RPG · Party-Based RPG · JRPG

FINAL FANTASY VI
Shared: RPG · JRPG · 2D

DRAGON QUEST III HD-2D Remake
Shared: RPG · Turn-Based Combat · JRPG

FINAL FANTASY III
Shared: RPG · JRPG · Exploration

Persona 5 Royal
Shared: Turn-Based Combat · RPG · JRPG

Monster Hunter Stories 3: Twisted Reflection
Shared: RPG · Creature Collector · Turn-Based Combat

Persona 3 Reload
Shared: RPG · Party-Based RPG · JRPG

Aethermancer
Shared: Creature Collector · Party-Based RPG · RPG

Touhou Artificial Dream in Arcadia
Shared: Turn-Based Combat · RPG · Dungeon Crawler