Push Gameplay

Push gameplay is one of the many types of mapping techs out there at the moment. The idea truly is to create an area that forces the player to move forward within the map and causes the area usually not able to be back tracked, preventing the player from reaching previous areas of the map.

One of the main ideas is to create an event that "pushes" the player forward. Mainly how you create that event is up to you but here are a few ways that mods and even Valve have implemented into their work.

Height Push

One of the most common Push methods encountered is the Height Push. The Height Push forces the player to move or jump off a high point, and land a few feet below. This kind of Push is used most often because it is very easy to implement in a map. Once the player drops off the ledge then the player cannot go back due to the ledge being just a little too high to reach. One map in Half Life 2 Episode 1 utilizes this method; the player exits an old hospital and drops off a ledge that is about waist high. The player is unable to return to that area because the ledge is too high.