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