Here is the full list of all 33 Furi achievements.
The base game contains 33 achievements, and there is 1 DLC pack containing 0 achievements.
Defeat The Song
Defeat The Hand
Defeat The Scale
Defeat The Line
Rise from a K.O. 20 times
Achieve 5 perfect parries during one fight against a guardian
Grab 10 heal pickups during a fight
Parry 20 bullets against a guardian in one fight without game over
Defeat The Strap
Hit a guardian 10 times with a melee attack in one fight without game over
Defeat The Chain
Defeat The Burst
Defeat The Edge
Defeat The Beat
Assimilate the Free World and make it your home
Defend the Free World against your invasion
Accept The Song's compromise
Meet with The Voice in the Free World
Meet The Voice in your cell after defeating The Chain
Turn your armor's light ON during a path
Get an A rank in Furi difficulty (story mode)
Get a S rank in Furi difficulty (story mode)
Complete the game in Furier difficulty
Get a S rank in Furier difficulty (story mode)
Keep the armor glowing at maximum level for one full phase
Hit one guardian 10 times with a boost hit in one fight without game over
Parry the same bullet 3 times after it bounces back from The Hand's shield
Parry 20 consecutive hits against a guardian without getting hit
Defeat a guardian within 5 minutes
Defeat a guardian without taking any hits
Beat Furi’s designer’s best speedrun time: 2:12:42
Beat Furi's combat designer’s best speedrun time: 1:29:56
Break all of The Line's shields before hitting him