• Contractual Obligation - If the player has [Gungine] , a pool of oil spawns underneath enemies killed using it.
• Cool Kids Club - If the player has [Strafe Gun] , continuously moving with the [Strafe Gun] held gives the player a yellow glow, increasing movement speed. The glow disappears if the player stops moving.
• Overdose - If the player also has [Heavy Bullets] , [Heavy Bullets] no longer decreases shot speed (this applies for all guns, not just Devolver). When the player gains the Overdose synergy through [Lich's Eye Bullets] , bullet speed is increased for all guns.
• Serious Sam Publishing Contract - If the player has [Serious Cannon] , alongside the cannonball, [Serious Cannon] fires a screaming Beheaded Kamikaze who chases enemies and explodes on contact.
• The devolve effect also works on the bells spawned by the Mine Flayer . This changes the bells into Arrowkin as well as sending out the ring of bullets they usually emit upon death, so using the gun in this fight is not recommended.
• The devolve effect does not work on bosses. The devolve effect also does not work on Mimics; however, bullets will still occasionally play the "devolve" sound when hitting a Mimic.
• Devolving an enemy causes it to drop coins .
• Devolved enemies will spawn with full health, in some cases granting them more health than before transformation.

Purchase from Doug for 10 .