You can get a base more than once depending on the format you can
get your own base in a solo game.Once you deactivate a base it automatically
shields you. They use mines instead of sentinels. Mines are little circular
objects they have placed one on the ceiling on the right side of
the arena and one on the ceiling on the left side of the arena. They have
3 stages, Orange means it's dormant and you can't
shoot it and it can't shoot you.Green Means
you can fire at it, and Red means it's firing
at you. You can get the mines 3 times total and you get 500 points
everytime you deactivate one. once you deactivate it, it turns red and
starts firing at everyone around you and you get points for everyone it
hits.You deactivate a mine just like a base, fire 3 times into it until
it shields you.