Games like Omnichess: Chess Variants
Games like Omnichess: Chess Variants include Plague Inc: Evolved, Rento Fortune: Online Dice Board Game (大富翁), The Escapists 2, Bloons TD 6, and UNO. We matched them by the tags players give Omnichess: Chess Variants on Steam (Casual, Strategy, Board Game, Turn-Based Tactics, and Wargame): closest matches first, and among equally close ones the better-known games.

Plague Inc: Evolved
Shared: Strategy · Casual · Tactical

Rento Fortune: Online Dice Board Game (大富翁)
Shared: Casual · Board Game · Strategy

The Escapists 2
Shared: Strategy · 2D · Crafting

Bloons TD 6
Shared: Strategy · Casual · 2D

UNO
Shared: Casual · Board Game · Strategy

Liars Bar
Shared: Casual · PvP · Co-op

Axis and Allies 1942 Online
Shared: Strategy · Board Game · Wargame

Richman 11
Shared: Casual · Board Game · Turn-Based Tactics

100% Orange Juice
Shared: Board Game · Strategy · Casual

Richman10
Shared: Casual · Strategy · Board Game

ShellShock Live
Shared: Strategy · Casual · 2D

Agrou
Shared: Casual · Strategy · Board Game

BidKing
Shared: Casual · Strategy · 2D

Mechabellum
Shared: Strategy · Wargame · Tactical

Company of Heroes 3
Shared: Strategy · Wargame · PvP

Overcooked! 2
Shared: Casual · Co-op · Local Co-Op

Plants vs. Zombies GOTY Edition
Shared: Strategy · Casual · 2D

No Time to Relax
Shared: Board Game · Casual · Strategy

Kingdom Rush - Tower Defense
Shared: Strategy · Casual · 2D

Town of Salem
Shared: Strategy · Casual · 2D

Factorio
Shared: Strategy · Crafting · Casual

Broken Arrow
Shared: Strategy · Wargame · Tactical

Pit People®
Shared: Strategy · 2D · Casual

Pummel Party
Shared: Board Game · Casual · Multiplayer