No missable achievements (plus 19 unknown)
Sign in with Steam or Xbox to track your progress, and:
Kill an enemy by launching them on a propane tank.
Kill a terrorist with a deflected bullet.
Finish the campaign.
Die as Brominator while in metallic form.
Kill 10 terrorists with a single turkey bomb.
Kick an enemy 3 times before they land as Timebro.
Kill a terrorist with a returned grenade.
Kill a terrorist with a martini.
Literally punch Satan so hard that he explodes.
Throw Satan off a cliff as Brommando.
Finish the campaign on hard.
Kill all the seagulls on the world map.
Have four players flex onscreen at the same time.
Throw an enemy off the sky fortress as Indiana Brones.
Finish the Ironbro campaign.