Ready or Not is a tactical first-person shooter that puts players in command of a SWAT unit responding to dangerous, high-stakes situations. Missions demand careful room clearing, use of less-lethal options, and coordination with AI or human teammates rather than reckless aggression.

Its deliberately slow, methodical pace and unforgiving gunfights punish carelessness, with civilians and armed suspects sometimes indistinguishable until it's too late. The tension of split-second decisions under pressure is central to its appeal.