Complete the training level
Complete the first level
Complete the second level
Complete the third level
Complete level four
Complete level five
Complete level six
Complete level seven
Complete level eight
Reach the end of the game
Wait for the true ending
Complete the game in less than 15 minutes
Shoot the dead end wall
Kill ten opponents at once
Find a Gulman reference (russian meme)
Listen to the joke
Gasp
Find a dead end in level 4
Find a dead end in level 7
Make it through the game without getting killed
Collect all the achievements
Break 100 lanterns
Complete secret level