Here is the full list of all 29 Knights of Braveland achievements.
Pull Success or Big Success 5 times in one raid
Win 3 battles in a row without taking damage
Dodge 50 attacks at the last moment
Kill enemies with an empowered strike 70 times
Pick up 1000 dropped coins
Defeat Big Omnom on any difficulty
Dodge 10 attacks at the last moment
Defeat Fromm on any difficulty
Kill 10 enemies with a secondary weapon shot
Kill enemies with an empowered strike 10 times
Pick up 150 dropped coins
Buy 1 starter bonus
Defeat Barry Ax on any difficulty
Kill 5 enemies with traps in one battle
Defeat the Skeleton King on Veteran difficulty
Defeat the Kraken on Veteran difficulty
Defeat Big Omnom on Veteran difficulty
Defeat the Skeleton King on any difficulty
Defeat the Kraken on any difficulty
Buy 60 starter bonuses
Buy all starting bonuses 1 time
Upgrade 3 of your hero's starting equipment to max. level
Upgrade 3 of your hero's starting equipment to level 1
Upgrade any hero's starting equipment to level 1
Hit 4 enemies with a grenade
Pull a Gap or a Big Gap 5 times in a single raid
Dodge 150 attacks at the last moment
Kill enemies with an empowered strike 200 times
Pick up 2500 dropped coins