1. A training simulator in which a participant engages in an environment simulated through projected videos about the participant, comprising, a plurality of videos; a plurality of screens, including at least a screen in front of the participant and behind the participant, wherein the simulator is adapted such that the participant can move about the simulator as part of his training; a plurality of projectors adapted to project the videos on the respective screens presenting life-size displays mutually coordinated to represent views of a same environment from a participant's perspective, each screen representing the participant's view looking in a different direction, including in front of and behind the participant; a detector adapted to detect participant actions within the training simulator; a computer directing and controlling videos projected by the projectors, the videos mutually time-synchronized and situationally coordinated, the computer receiving input from the detector and programmed to logically branch as a result of user input through the detector to direct a different video from the database to at least one of the projectors, representing situational changes caused by participant action; a weapon or simulated weapon as a participant input device employable by the participant and retained by the participant during participant's engagement with the simulated environment, shooting of the weapon or simulated weapon causing it to emit light therein in response to a threat situation presented to the participant on a screen, which light is detected within the simulated environment, wherein the displayed videos at least in part present said threat situation to the participant and wherein said detector further comprises a light detector located at least one screen configured to detect light emitted from the weapon or simulated weapon directed at said screen; and, a microphone connected to the computer and adapted to detect verbal input from the participant, the computer interpreting said verbal input as commands integrated as a response of the participant to the simulated environment.