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