Games like Territory Control 2
Games like Territory Control 2 include Factorio, Satisfactory, Scrap Mechanic, Forts, and Space Engineers. We matched them by the tags players give Territory Control 2 on Steam (Base Building, Resource Management, Physics, Gun Customization, and Crafting): closest matches first, and among equally close ones the better-known games.

Factorio
Shared: Base Building · Resource Management · Crafting

Satisfactory
Shared: Base Building · Crafting · Resource Management

Scrap Mechanic
Shared: Physics · Sandbox · Base Building

Forts
Shared: Base Building · Physics · Multiplayer

Space Engineers
Shared: Sandbox · Physics · Base Building

Rust
Shared: Crafting · Multiplayer · Sandbox

Garry's Mod
Shared: Physics · Sandbox · Multiplayer

Stationeers
Shared: Base Building · Physics · Resource Management

ARK: Survival Ascended
Shared: Base Building · Multiplayer · Crafting

Brick Rigs
Shared: Sandbox · Physics · Multiplayer

Raft
Shared: Multiplayer · Base Building · Crafting

From the Depths
Shared: Physics · Sandbox · Crafting

ARK: Survival Evolved
Shared: Multiplayer · Base Building · Crafting

Medieval Dynasty
Shared: Crafting · Multiplayer · Base Building

Prison Architect
Shared: Base Building · Sandbox · Simulation

Oxygen Not Included
Shared: Base Building · Resource Management · Sandbox

Eco
Shared: Base Building · Resource Management · Crafting

Once Human
Shared: Multiplayer · Base Building · Action

Terraria
Shared: Sandbox · Multiplayer · Crafting

Medieval Engineers
Shared: Physics · Sandbox · Multiplayer

The Last Caretaker
Shared: Base Building · Crafting · Resource Management

MineMogul
Shared: Physics · Base Building · Crafting

Besiege
Shared: Physics · Sandbox · Simulation

Stardew Valley
Shared: Multiplayer · Crafting · Sandbox