blinkBoss - teleports after you, drops grenades after each teleport
sneaker (the stealthy black pentagons) - decloaks slower, moves slower, is smaller, has more health
some mobs can now sense you by "smelling" where you were
they check for a clear line of sight with your last 10 seconds of history
snakeBoss, blinkBoss, sneaker
extra bosses no longer spawn on final level
beating the final boss clears mobs that spawn after a mob dies, like powerUpBoss
phonon and isotropic radiator range reduced about 10%