Here is the full list of all 26 LOVE 2: kuso achievements.
Collect 49 YOLO Medals
Get two A's in any category of your results.
Complete kuso Level 25 without using any respawn points
Get an A in any category of your results
Complete kuso in under 15 minutes on any difficulty
Complete kuso in Speedrun Mode with 100% Completion
Complete LOVE+kuso 100% in Speedrun Mode
Complete LOVE+kuso in under 30 minutes
Fall for two minutes straight.
In Level Select Mode, beat a level without jumping.
In Level Select Mode, beat a level in under 10 seconds.
Complete kuso on either Arcade or Hard Mode
Complete kuso while having collected all 8 Extra Lives
In Level Select Mode, beat the Credits in under 01:15
In dedication not just to Charlie, but to you.
Collect all five Charlie tokens in one playthrough of kuso
Perform a smooth maneuver on kuso Level 2
Complete LOVE
Complete LOVE+kuso
Climb kuso Level 22 without using safety ledges
Take the upper path on kuso Level 18