Games like Ooglians
Games like Ooglians include Mindustry, Factorio, Tower Factory, They Are Billions, and Kingdom Rush 6: Genesis TD. We matched them by the tags players give Ooglians on Steam (Tower Defense, Base Building, Logic, Automation, and Hand-drawn): closest matches first, and among equally close ones the better-known games.

Mindustry
Shared: Base Building · Tower Defense · Automation

Factorio
Shared: Base Building · Automation · Strategy

Tower Factory
Shared: Tower Defense · Automation · Base Building

They Are Billions
Shared: Base Building · Tower Defense · Strategy

Kingdom Rush 6: Genesis TD
Shared: Tower Defense · Strategy · Base Building

Tower Dominion
Shared: Tower Defense · Base Building · Strategy

GemCraft - Frostborn Wrath
Shared: Tower Defense · Strategy · RTS

The King is Watching
Shared: Base Building · Tower Defense · RTS

Thronefall
Shared: Tower Defense · Strategy · Base Building

shapez
Shared: Base Building · Automation · Strategy

Age of Darkness: Final Stand
Shared: Tower Defense · Base Building · Strategy

Border Pioneer
Shared: Tower Defense · Base Building · Strategy

Bloons TD 6
Shared: Tower Defense · Strategy · 2D

DG2: Defense Grid 2
Shared: Tower Defense · Base Building · Strategy

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

Dyson Sphere Program
Shared: Base Building · Automation · Strategy

Kingdom Rush 5: Alliance TD
Shared: Tower Defense · Strategy · 2D

Stationeers
Shared: Base Building · Automation · Logic

ShapeHero Factory
Shared: Base Building · Tower Defense · Automation

Satisfactory
Shared: Base Building · Automation · Strategy

Emberward
Shared: Tower Defense · Base Building · Strategy

Drill Core
Shared: Tower Defense · Strategy · Roguelite

Cult of the Lamb
Shared: Base Building · Roguelite · Strategy

Taur
Shared: Tower Defense · Base Building · Strategy