Games like Hexogin
Games like Hexogin include Door Kickers 2: Task Force North, Door Kickers, Shadow Tactics: Blades of the Shogun, FTL: Faster Than Light, and Aliens: Dark Descent. We matched them by the tags players give Hexogin on Steam (Strategy, Hex Grid, Real-Time with Pause, Real Time Tactics, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Door Kickers 2: Task Force North
Shared: Real-Time with Pause · Real Time Tactics · Strategy

Door Kickers
Shared: Strategy · Real-Time with Pause · Action

Shadow Tactics: Blades of the Shogun
Shared: Strategy · Real Time Tactics · Singleplayer

FTL: Faster Than Light
Shared: Strategy · Singleplayer · Indie

Aliens: Dark Descent
Shared: Strategy · Real Time Tactics · Action

Creeper World 3: Arc Eternal
Shared: Strategy · Real-Time with Pause · Singleplayer

Call to Arms - Gates of Hell: Ostfront
Shared: Strategy · Real Time Tactics · Singleplayer

Command & Conquer™ Red Alert™ 3
Shared: Strategy · Level Editor · Action

Command & Conquer 3 Tiberium Wars™
Shared: Strategy · Level Editor · Action

Mount & Blade II: Bannerlord
Shared: Strategy · Singleplayer · Action

Command & Conquer™ 3: Kane’s Wrath
Shared: Strategy · Level Editor · Action

Rhythm Doctor
Shared: Level Editor · Singleplayer · Indie

Total War: WARHAMMER II
Shared: Strategy · Singleplayer · Action

Desperados III
Shared: Strategy · Real Time Tactics · Singleplayer

Total War: WARHAMMER III
Shared: Strategy · Real Time Tactics · Action

Command & Conquer: Red Alert 3 - Uprising
Shared: Strategy · Level Editor · Action

911 Operator
Shared: Strategy · Singleplayer · Indie

Planetary Annihilation: TITANS
Shared: Strategy · Real Time Tactics · Singleplayer

Infested Planet
Shared: Strategy · Action · Singleplayer

The Escapists
Shared: Strategy · Singleplayer · Action

Plague Inc: Evolved
Shared: Strategy · Singleplayer · Indie

Sid Meier's Civilization® V
Shared: Strategy · Hex Grid · Singleplayer

A Dance of Fire and Ice
Shared: Level Editor · Singleplayer · Indie

Company of Heroes 3
Shared: Strategy · Singleplayer · Real Time Tactics