Achievements count - 15
Achievements complexity - 3/10
Broken achievements - No
Hours to 100% - 10-12 hours

Invincible
50/100/200 knock-outs in 1 round


Obtainable at level 3. Fight outside the circles until the achievement pop up.



Astronaut
Perform ‘To the moon’ 10/50/100 times

To the moon means that your enemy fly enough far after death. Critical hits with weapon more likely causes it. There should be enough space.



Iron Fist
Strike critical damage 100 times.


They are random, but you can make it more often with Critical Hit skill.

Consumer
Buy 100 items in the shop.


Cheapest weapon costs 30/24 (buy/sell) You need at least 600 coins to get it.



Merchant
Sell 200 items in the shop. Without using "Sell all" button.


Same for it. You need 1200 coins.



Follower
Level any skill up to 5th level


Master
Level all the skills up to 5th level


Office King
Reach 55th character's level


At level 55 you will have enough points to learn all skills.
Here is list of everything that gives you XP:
1 kill - 15 XP
2x combo - 15 XP
3x combo - 20 XP
To the moon - 50 XP
% of all XP gained during any mission after completing it.

Farm 3rd level with full regeneration and melee combat skills. It will take 2 hits for every enemy.

Armageddon
Knock 100/2500/5000 people


You will get them before reaching level 55. Boring farm :/