Bosses are powerful tanks that can spawn from destroying a sanctuary or from random spawning events. They are usually more powerful than any tank (save Redistributor) and are commonly seen with very large scores. Some bosses are grouped into categories such as Fallen or Reanimated, and some can spawn from the deaths of more powerful bosses. Bosses (many which are AWPs) spawn every round in Boss Rush mode, and have to be defeated in order to win the game. Most bosses ignore VPN tanks, and many bosses can be killed by VPN in solo. (unless VPN does not do enough damage to penetrate the shield) Occasionally bosses may spawn inside a base, and die instantly. There is a rare bug that a boss spawn will initiate but it will spawn too things named undefined though there are no bosses spawned; This bug is not fixed.