PUSH's Original Gameplay :: Two teams. One goal. Get to the finish line with all your teammates before the other team. Both teams are placed in a city, and at ten seconds into the round, a location is randomly picked somewhere inside the city. (On a roof top, in a sewer, in a building, on a scaffold, in the street, etc.) Both teams must get their entire team on the spot before the other team. Teammates won't spawn all together in a single location, but rather spread out through the city. Some may start closer to the goal, and some may start further away from the goal.
PUSH-CTF Gameplay :: Same as the listed above, but instead of one single 'goal' area, each team has a randomly picked 'Flag' location. You must reach your opponent's flag and bring it back to your flag's location first. The team that reaches three captures first is declared the winner.
PUSH-Deathmatch Gameplay :: From the start, one location is picked for all players to reach. Once someone reaches it, they gain one point. A new location is picked and the process is repeated until the time limit ends. The player with the most points wins. This gameplay has optional weapons, such as guns. If you 'die' from a fellow player, you restart where you were at the start of the round.
Sandbox Gameplay :: No goals, no teams. Just you and your friends running through the city. Weapons optional.