The base defense genre is both broad and varied, with roots in real-time strategy games such as Stronghold, which took the base-building aspects of the RTS genre and shined a spotlight on them. In more recent years, indie developers in particular have tapped into the joy of building and defending a base. From smash-hit indie titles like They Are Billions to the more recent Thronefall, there are a variety of experiences to be had in the base defense genre.