Games like Deus Novum
Games like Deus Novum include Forts, Totally Accurate Battle Simulator, Ultimate Epic Battle Simulator 2, WorldBox - God Simulator, and From the Depths. We matched them by the tags players give Deus Novum on Steam (Strategy, God Game, Adventure, Artificial Intelligence, and Action): closest matches first, and among equally close ones the better-known games.

Forts
Shared: Strategy · Base Building · Building

Totally Accurate Battle Simulator
Shared: Strategy · Sandbox · Adventure

Ultimate Epic Battle Simulator 2
Shared: Strategy · God Game · Action

WorldBox - God Simulator
Shared: God Game · Artificial Intelligence · Sandbox

From the Depths
Shared: Building · Strategy · RTS

Scrap Mechanic
Shared: Building · Adventure · Base Building

ARK: Survival Ascended
Shared: Base Building · Adventure · Building

From Dust
Shared: God Game · Strategy · Adventure

Once Human
Shared: Action · Building · Adventure

TerraTech
Shared: Building · Action · Adventure

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

Space Engineers
Shared: Building · Sandbox · Base Building

The Riftbreaker
Shared: Base Building · Building · Adventure

Mindustry
Shared: Strategy · Base Building · RTS

Satisfactory
Shared: Base Building · Building · Adventure

ARK: Survival Evolved
Shared: Adventure · Building · Base Building

Hogwarts Legacy
Shared: Adventure · Magic · Fantasy

SPORE™
Shared: God Game · Sandbox · Strategy

Legends of Ellaria
Shared: Strategy · Adventure · Action

Terraria
Shared: Adventure · Sandbox · Building

Planet Coaster
Shared: Strategy · Building · Sandbox

Enshrouded
Shared: Base Building · Adventure · Building

Mount & Blade: Warband
Shared: Strategy · Action · Adventure

Planetary Annihilation: TITANS
Shared: Strategy · RTS · Base Building