Goo Gun & Goo Grenade
HeavyEasy
Gadget
Walls of goo block sightlines, doorways, and movement abilities (goo now stops Dash and Grapple).
Counter Fire removes goo instantly: a Pyro Grenade, the Flamethrower, or any flame clears a path. Explosives also blow through it. Otherwise just go around, since goo is cover, not a kill tool.
Best countersPyro GrenadeFlamethrower
Guardian Turret
MediumEasy
Specialization
An auto-aiming turret locks down a room and calls out your position.
Counter A Glitch Grenade disables it, and explosives or focused fire destroy it. Break its line of sight with Goo, Smoke, or a Barricade, or peek from outside its roughly 20m range. Place your own turret on a ceiling to deny easy destruction.
Best countersGlitch GrenadeFrag Grenade
APS Turret
MediumEasy
Gadget
Shoots down your projectiles (grenades, RPG, C4) near a defended objective.
Counter It only stops projectiles, so hitscan guns ignore it entirely. Overwhelm it with several thrown gadgets at once, Goo it (each blob it intercepts damages it), or simply shoot it down, since it has low HP.
Best countersGoo GrenadeGlitch Grenade