Games like Interregnum
Games like Interregnum include Magic: The Gathering Arena, Armello, GWENT: The Witcher Card Game, UNO, and Gremlins, Inc.. We matched them by the tags players give Interregnum on Steam (Deckbuilding, Board Game, Medieval, Strategy, and Multiplayer): closest matches first, and among equally close ones the better-known games.

Magic: The Gathering Arena
Shared: Strategy · Deckbuilding · Card Game

Armello
Shared: Board Game · PvP · Strategy

GWENT: The Witcher Card Game
Shared: Strategy · Deckbuilding · Card Game

UNO
Shared: Board Game · Multiplayer · Card Game

Gremlins, Inc.
Shared: Board Game · Strategy · Multiplayer

Tabletop Simulator
Shared: Board Game · Multiplayer · Card Game

Talisman: Digital Classic Edition
Shared: Board Game · Strategy · Multiplayer

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

Carcassonne - Tiles and Tactics
Shared: Board Game · Strategy · Multiplayer

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

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

Blood Bowl 2: Legendary Edition (Classic)
Shared: Strategy · Board Game · Multiplayer

The Bazaar
Shared: Deckbuilding · Strategy · Card Game

Blood Bowl 3
Shared: Multiplayer · PvP · Strategy

Monster Train 2
Shared: Deckbuilding · Card Game · Strategy

Dune: Imperium
Shared: Board Game · Deckbuilding · Strategy

Root
Shared: Board Game · Strategy · Tabletop

FOR HONOR™
Shared: Medieval · Multiplayer · PvP

Wingspan
Shared: Board Game · Strategy · Card Game

9 Kings
Shared: Strategy · Deckbuilding · Card Game

Through the Ages
Shared: Board Game · Strategy · Multiplayer

Twilight Struggle
Shared: Board Game · Strategy · Card Game

TerraScape
Shared: Board Game · Deckbuilding · Medieval

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