Games like Vasterra
Games like Vasterra include Thronefall, Stronghold: Definitive Edition, Age of Darkness: Final Stand, Stronghold Crusader: Definitive Edition, and Cities: Skylines. We matched them by the tags players give Vasterra on Steam (City Builder, Action RTS, RTS, Building, and Real Time Tactics): closest matches first, and among equally close ones the better-known games.

Thronefall
Shared: City Builder · Tower Defense · Action RTS

Stronghold: Definitive Edition
Shared: City Builder · Real Time Tactics · Building

Age of Darkness: Final Stand
Shared: Action RTS · RTS · Tower Defense

Stronghold Crusader: Definitive Edition
Shared: City Builder · Real Time Tactics · Building

Cities: Skylines
Shared: City Builder · Building · Strategy

They Are Billions
Shared: RTS · City Builder · Strategy

Kingdom Two Crowns
Shared: City Builder · Tower Defense · Building

Stronghold HD (2012)
Shared: City Builder · Real Time Tactics · Building

Bee Island
Shared: City Builder · Action RTS · Tower Defense

Stronghold Crusader HD (2012)
Shared: City Builder · Real Time Tactics · Building

Lessaria: Fantasy Kingdom Sim
Shared: City Builder · RTS · Strategy

Frostpunk
Shared: City Builder · Building · Strategy

Farthest Frontier
Shared: City Builder · Building · Strategy

Creeper World 4
Shared: Real Time Tactics · Tower Defense · Building

Kingdoms and Castles
Shared: City Builder · Building · Management

Manor Lords
Shared: City Builder · Strategy · Building

Banished
Shared: City Builder · Strategy · Survival

Cities: Skylines II
Shared: City Builder · Building · Management

Becastled
Shared: City Builder · Building · RTS

Attack on Toys
Shared: Action RTS · RTS · Real Time Tactics

Two Point Museum
Shared: City Builder · Building · Casual

Foundation
Shared: City Builder · Building · Strategy

Mini Motorways
Shared: Casual · Strategy · Management

Stronghold 2: Steam Edition
Shared: City Builder · Real Time Tactics · Building