Containment (RTS)

Containment, is a term used in real-time strategy games to describe the act of controlling an enemy player's advancement, while often expanding oneself.

Containment is a tactic most commonly used in the real-time strategy game, StarCraft. It often consists of surrounding an enemy base with such great numbers of units/buildings, that they cannot possibly leave their base.

Containment can be referred to as any way to keep an opponent in check as well.