Tank Buster is an achievement in Metro 2033, awarded for destroying the NaziPanzer in Trolley Combat. To get this achievement, wait until the panzer enters the room with the gorge separating the railcar and the tank. When it has entered far enough, shoot the bridge it's driving over, or the supports (the pillars under the bridge). This will cause the bridge to collapse and the tank will fall down into the darkness. To destroy the panzer quickly, do not fire any shots until it is over the weak pillars, as this will prevent the gun from overheating too quickly. Destroying the panzer is a mandatory requirement to complete the level, thus the player does not need to worry about missing this achievement.