Games like Sea Chess
Games like Sea Chess include Dota Underlords, Balatro, Just Go, Into the Breach, and Cobalt Core. We matched them by the tags players give Sea Chess on Steam (Strategy, Card Game, Turn-Based Strategy, Auto Battler, and 3D Platformer): closest matches first, and among equally close ones the better-known games.

Dota Underlords
Shared: Strategy · Auto Battler · Casual

Balatro
Shared: Card Game · Strategy · Singleplayer

Just Go
Shared: Strategy · Turn-Based Strategy · Card Game

Into the Breach
Shared: Strategy · Turn-Based Strategy · Indie

Cobalt Core
Shared: Card Game · Strategy · Turn-Based Strategy

Infinity Wars: Animated Trading Card Game
Shared: Strategy · Card Game · Turn-Based Strategy

Yu-Gi-Oh! Master Duel
Shared: Card Game · Strategy · Turn-Based Tactics

9 Kings
Shared: Strategy · Auto Battler · Card Game

Armello
Shared: Turn-Based Strategy · Card Game · Strategy

Library Of Ruina
Shared: Card Game · Strategy · Indie

Monster Train 2
Shared: Card Game · Strategy · Turn-Based Strategy

Sid Meier’s Civilization® VI
Shared: Strategy · Turn-Based Strategy · Singleplayer

The Last Flame
Shared: Strategy · Auto Battler · Turn-Based Strategy

Bloons TD 6
Shared: Strategy · 3D · Singleplayer

The Last Spell
Shared: Strategy · Turn-Based Strategy · Turn-Based Tactics

Warhammer 40,000: Battlesector
Shared: Strategy · Turn-Based Strategy · 3D

Wingspan
Shared: Card Game · Strategy · Turn-Based Strategy

Slay the Spire
Shared: Card Game · Strategy · Indie

Magic: The Gathering Arena
Shared: Strategy · Card Game · Turn-Based Strategy

Gomoku Let's Go
Shared: Strategy · 3D · Turn-Based Strategy

Slay the Spire 2
Shared: Card Game · Strategy · Indie

XCOM®: Chimera Squad
Shared: Strategy · Turn-Based Strategy · Turn-Based Tactics

Esports Godfather
Shared: Strategy · Card Game · Indie

Sultan's Game
Shared: Strategy · Card Game · Singleplayer