Games like Annulus
Games like Annulus include Marvels Midnight Suns Digital Edition, Battle Brothers, King's Bounty II, Wartales, and Banner of the Maid. We matched them by the tags players give Annulus on Steam (Strategy, Board Game, Turn-Based Tactics, Tactical RPG, and Turn-Based Strategy): closest matches first, and among equally close ones the better-known games.

Marvels Midnight Suns Digital Edition
Shared: Turn-Based Tactics · Tactical RPG · Turn-Based Strategy

Battle Brothers
Shared: Strategy · Turn-Based Tactics · Turn-Based Strategy

King's Bounty II
Shared: Strategy · Turn-Based Strategy · Tactical RPG

Wartales
Shared: Turn-Based Strategy · Medieval · RPG

Banner of the Maid
Shared: Strategy · Turn-Based Tactics · Turn-Based Strategy

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

Jagged Alliance 3
Shared: Strategy · Turn-Based Tactics · Turn-Based Strategy

Demeo
Shared: Strategy · Turn-Based Tactics · Turn-Based Strategy

Monster Train
Shared: Turn-Based Tactics · Card Battler · Turn-Based Strategy

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

STAR WARS Zero Company™
Shared: Turn-Based Tactics · Strategy · Turn-Based Strategy

MENACE
Shared: Strategy · Turn-Based Tactics · Turn-Based Strategy

Mount & Blade II: Bannerlord
Shared: Strategy · Medieval · RPG

Trials of Fire
Shared: Turn-Based Tactics · Tactical RPG · Card Battler

TROUBLESHOOTER: Abandoned Children
Shared: Turn-Based Tactics · Tactical RPG · Turn-Based Strategy

FINAL FANTASY TACTICS - The Ivalice Chronicles
Shared: Turn-Based Tactics · Turn-Based Strategy · Tactical RPG

Fell Seal: Arbiter's Mark
Shared: Strategy · Turn-Based Tactics · Tactical RPG

For The King II
Shared: Strategy · Board Game · Turn-Based Strategy

Expeditions: Rome
Shared: Strategy · Turn-Based Strategy · Turn-Based Tactics

Super Robot Wars 30
Shared: Strategy · Turn-Based Strategy · Turn-Based Tactics

Heroes of Might and Magic: Olden Era
Shared: Strategy · Turn-Based Strategy · RPG

The Legend of Fancy Realm Remake
Shared: Turn-Based Tactics · Tactical RPG · Board Game

Gloomhaven
Shared: Tactical RPG · Strategy · Turn-Based Strategy

Symphony of War: The Nephilim Saga
Shared: Tactical RPG · Turn-Based Strategy · RPG