Here is the full list of all 22 Knightin' + achievements.
Defeated the generic dark lord.
You won't believe how slimming this tough armor is.
Unique items? Collected'em all!
No closed chest was left behind...
Obviously, found all the golden keys.
Great power may lead to unpleasant consequences (or not).
Big Red Potions... There is always not enough of them.
Defeated the master of mucus.
Sends projectiles back where they came from. That's mean.
Secret hold-attack-button-to-charge technique unlocked.
Ought to teleport to other worlds. But teleports to other rooms.
Makes you invulnerable! But only after you were hurt...
Defeated the unfinished titan.
Point at your target. Shoot magic bolts. Try not to miss.
Now you can move heavy things and open jars with bare hands!
Simple dash isn't cool enough? How about a trail of flames?
Defeated almost a dragon.
Allows you to dash because walking is slow and boring.
Place it in front of anything dangerous. It's as simple as that.
Swing it towards your foe. Haven't won yet? Repeat previous step.
Finished the game under 90 minutes and without cheating.
Finished the game without dying even once and cheating.