the BLU team must push an explosive cart along a track, while the RED team must prevent the cart from reaching their base. To push the cart, at least one BLU player must stay within the range of the cart, which will dispense health and ammo every few seconds. The cart's speed will increase as more BLU players attempt to push it. Payload maps have multiple "checkpoints" along the track. Once these checkpoints are captured, they may adjust the spawn locations of both teams. Capturing a checkpoint will also increase the time limit. If the cart is not pushed by the BLU team for 20 seconds, it will begin to move back to the last captured checkpoint, where it will stop. The RED team can stop the cart from being pushed by being within range of it. The RED team wins by preventing the cart from reaching the final checkpoint before time runs out. Alternative game modes There are several alternative game modes in Team Fortress 2. These modes consist of a small number of maps and detach from the core game modes in some way. Arena is a special game mode in which players do not respawn upon death. A team can win either by eliminating all opposing players, or by claiming a single capture point that opens after a certain time has elapsed. This mode is currently unavailable through matchmaking, but is still accessible through community servers. Mannpower is a mode in which players have access to a grappling hook and assorted power-ups laid around the map that grant unique abilities. While not bound to any specific mode, all current official Mannpower maps use a variation of Capture the Flag. In Mannpower's variation of Capture the Flag, both teams have an intelligence flag, and the first team to capture the enemy's intelligence ten times wins. The mode is heavily inspired by the Quake mod, Threewave CTF, a mod created by former Valve employee David Kirsch. Medieval Mode is a mode in which players are restricted to using melee and support weapons, with certain exceptions for medieval-themed projectile weapons. While not bound to any specific mode, the only official Medieval Mode map uses a 3CP variation of Attack/Defend. If Medieval Mode is enabled on a map, select phrases spoken by players in the in-game text chat will be replaced with more thematic variants, such as "hello" being replaced with