StarCraft has remained popular for more than two decades. One of the main reasons is the balance between its three races: Terran, Zerg, and Protoss.
Each race plays differently but remains competitive against the others. This balance creates interesting strategic decisions in every match.
The game also has a very high skill ceiling. Players can always improve their economy management, micro control, and decision making.
Because of this depth, StarCraft became a cornerstone of early esports and is still respected by strategy fans today.