Solve your first problem

Solve 10 problems

Solve 50 problems

Solve 100 problems

Finish every problem in Blind 75

Solve 250 problems

Solve 450 problems

3 day streak

7 day streak

30 day streak

100 day streak

Solve your first Hard

Solve 25 Hard problems

Solve 60 Hard problems

Solve 100 Medium problems

Solve 25 problems without hints

Solve 100 problems without hints

Complete 50 spaced repetition reviews

Complete 250 reviews

Solve at least one problem in 12 topics

Solve at least one problem in every topic

Reach level 10

Reach level 25

Reach level 40

Watch 10 algorithm visualisations

Watch 30 visualisations

Hit your daily goal 7 days running

Hit your daily goal 30 times

Win 5 arena rounds

Win 25 arena rounds

Score 90% or better on a complexity quiz

Log 10 hours of practice

Log 100 hours of practice

Earn 5,000 XP

Earn 25,000 XP

Finish 10 focus sessions

Finish 50 focus sessions

Clear 7 daily challenges

Clear 30 daily challenges

Keep going and it will unlock itself.

Keep going and it will unlock itself.

Keep going and it will unlock itself.