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