Reach the first layer of snow.
Complete the tutorial.
Take out your first bandit
Get a Game Over 5 times in a row.
Try to cheat, either possible way.
Deflect 100 shurikens
Wow. Nice one. You finally understand that 2+2=4. Congrats.
You reach your first 10. Prepare for a long journey.
Unlock this medal to learn its secrets!
Place it in front of anything dangerous. It's as simple as that.