Games like Buttons Up! 2
Games like Buttons Up! 2 include Factorio, They Are Billions, Oxygen Not Included, Frostpunk, and This War of Mine. We matched them by the tags players give Buttons Up! 2 on Steam (Strategy, Survival, RTS, Incremental, and Tactical): closest matches first, and among equally close ones the better-known games.

Factorio
Shared: Strategy · Resource Management · Survival

They Are Billions
Shared: Strategy · Survival · RTS

Oxygen Not Included
Shared: Survival · Resource Management · Strategy

Frostpunk
Shared: Survival · Strategy · Resource Management

This War of Mine
Shared: Survival · Strategy · Singleplayer

Cartel Tycoon
Shared: RTS · Survival · Strategy

RimWorld
Shared: Survival · Strategy · Management

Cities: Skylines
Shared: Strategy · Management · Building

Kingdoms and Castles
Shared: Strategy · Resource Management · Management

Manor Lords
Shared: Strategy · Management · Resource Management

Age of Empires II (Retired)
Shared: Strategy · RTS · Resource Management

The Alters
Shared: Survival · Strategy · Management

Aliens: Dark Descent
Shared: Strategy · RTS · Tactical

Going Medieval
Shared: Strategy · Survival · Management

Farthest Frontier
Shared: Strategy · Resource Management · Building

Banished
Shared: Strategy · Survival · Singleplayer

Creeper World 3: Arc Eternal
Shared: Strategy · RTS · Singleplayer

Against the Storm
Shared: Strategy · Management · Resource Management

Sheltered
Shared: Survival · Strategy · Resource Management

Cookie Clicker
Shared: Incremental · Management · Strategy

Startup Company
Shared: Strategy · Management · Singleplayer

Prison Architect
Shared: Strategy · Management · Building

IXION
Shared: Strategy · Survival · Resource Management

Company of Heroes 2
Shared: Strategy · RTS · Tactical