Sentry Expert

Sentry Expert is the 4th upgrade of Path 1 for the Engineer Monkey. It allows the Engineer to create specific sentries that specialize at specific bloon types. There are four types of sentry that the Engineer may produce: a red Crushing Sentry (mini-Juggernaut balls), a purple Energy Sentry (laser beams) a black Boom Sentry (bombs, similar to Bomb Shooter), a white Cold Sentry (cold snowballs, similar to Cryo Cannon). It costs $TBA on Medium.