1. Use the beginners mode
2. Have your stamina bar and extra stamina bar full. No negative effects.
2. Find energy drink and lollipop
3. Find a tall wall without any points where your character might "grab" the edge. Easiest biome to do it is tropics. The best walls have no green parts and look mostly vertical.
4. Drop your backpack or anything that adds weight.
5. Drink energy drink, than eat lollipop and immiedeatly start climbing until your character starts sliding down.
You should get the achievment with a lot to spare. Other method is to use vertical vines as it also counts towards the achievment.