Stockpile is an objective gametype that debuted in the video game Halo: Reach.
The objective of Stockpile is to pickup and deliver flags scattered throughout the map to your designated area, or "stockpile". Each flag left remaining within the stockpile after the given amount of time is up will reward the player with a point. Since points are only rewarded once the given time reaches zero, each team may take flags out of the other team's stockpile before the time is up in order to prevent them from scoring.
Stockpile is a sort of hybrid of Neutral flag and territories. Territories being a factor because it required a team to safeguard a particular point in the map for a period of time, and neutral flag because the flag on the map was any team's to take.
In the Halo: Reach Multiplayer Beta, the team that first reaches 10 points wins.