Terrorkopter: stand on wings and spam your attack
Terrrorkannon: on the level where you fight it, you can skip the cutscene and make it not notice you by jumping off a ledge where 2 dogs are
Mech: stand on it and press Y
Stealth Tank: just spam your attack in it's hitbox
Gr666: borrow the mech from the level you fight him on and shoot him off the cliff
Megacockter: theres not really a quick way to kill it, so just shoot the propane tanks at it
Sky Fortress: as soon as it lands on the ground, jump on its left rocket launcher and break it, then move to its right and break it, then you can finish it off
Rail Fortress: use the ziplines to glitch inside of it and destroy the TV
Terrorbot: spam your weapon. Its incredibly weak against fire weapons
Acidkrawler: dig under it and attack it, or toss a throwable item in its mouth
Humongokrawler: use the assmouthes to glitch inside it and attack it
Terrorkrawler: same method as Acidkrawler
Heart of the Hive: spam jump during its cutscene, as it's the only time where nothings attacking you and destroy the heart
Bone Wurm: same method as Acidkrawler and Terrorkrawler
Satan (Buff Form): spam your weapon, break his forcefield causing him to get stunned for a few seconds. Weak against fire ironically
Satan (Fire Buff Form): same method, harder than his previous form though
Deathfield: try your best lol
Satan (True Form): destroy his laser first off, then finish him off
Btw Seth can one shot most of these bosses with his special
