RTS / MOBA style objective where the goal is to either kill all buildings, or kill the main building (Nexus).

Can be:

1. Player spawned object - Players get periodic rewards for how long the structure stays alive, and a jackpot that is rewarded to the enemy team who can destroy it (which reward scales with time as well)

2. Stationary, pre-spawned map object (League of Legends), which is easier for map design and simpler zones. This means players always have a location to run towards, rather than running at the enemies spawn point and camping.