Full list of all 21 Guns, Gore & Cannoli achievements worth 1,000 gamerscore. It takes around 5-6 hours to unlock all of the achievements on Xbox One.
Kill 2000 enemies
Complete the game on normal mode
Complete the game on hard mode
Complete the game on impossible mode
Kill 20 enemies in the alleystreets, during one run, by kicking them into fire.
Complete the game on easy mode
Survive The construction site without killing any enemies with weapons.
Defeat Mickey
Survive the sewer using only your Lupara
Kill 1000 enemies
Survive the river level using only your magnum
Survive the army stronghold without killing any enemies.
Complete 'Bonnino's Stripclub' without dying once on Normal Mode
Defeat Sonny
Destroy 10 cars
Kill 400 enemies
10 multi-enemy grenade kills
5 multi-enemy grenade kills
Eat 10 Cannoli
50 headshots
Consecutively kill 25 enemies with a headshot