You can encounter Brauggi the snow giant in the area in front of Gastropnir Keep before Chapter 4 when playing under a higher difficulty setting. He will fight you after a brief conversation. In battle, he is similar to a Jotunn. Defeat him to earn the achievement.
<br><table width='100%' cellpadding=3 cellspacing=3 border=0><tr valign='top'><th>Achievement</th><th>How to unlock
</th></tr><tr valign='top'><td>A POIsonous Achievement!</td><td>You've waited 24 years to do this!
</td></tr><tr valign='top'><td>Adept Rogue</td><td>Reach chapter 3 as rogue.
</td></tr><tr valign='top'><td>Adept Sorceress</td><td>Reach chapter 3 as sorceress.
</td></tr><tr valign='top'><td>Adept Warrior</td><td>Reach chapter 3 as warrior.
</td></tr><tr valign='top'><td>Another Head Hangs Lowly</td><td>Defeat Dolores.
</td></tr><tr valign='top'><td>Apprentice Rogue</td><td>Reach chapter 2 as rogue.
</td></tr><tr valign='top'><td>Apprentice Sorceress</td><td>Reach chapter 2 as sorceress.
</td></tr><tr valign='top'><td>Apprentice Warrior</td><td>Reach chapter 2 as warrior.
</td></tr><tr valign='top'><td>Archmage</td><td>Learn the lightning bolt spell.
</td></tr><tr valign='top'><td>Braugging Rights</td><td>Defeat Brauggi.
</td></tr><tr valign='top'><td>Bronze Medal</td><td>Win an easy victory in the Test of Fate.
</td></tr><tr valign='top'><td>Cutting Corners</td><td>Steal a quest reward without doing the quest.
</td></tr><tr valign='top'><td>Dark and Troubled</td><td>Complete the game while cursed.
</td></tr><tr valign='top'><td>Dirty Rotten Scoundrel</td><td>Complete the game with less than 10 honor.
</td></tr><tr valign='top'><td>Don't Lose Your Head</td><td>Get decapitated in combat.
</td></tr><tr valign='top'><td>Gold Medal</td><td>Win a difficult victory in the Test of Fate.
</td></tr><tr valign='top'><td>Grandmaster Heroine</td><td>Play the entire game on hardest difficulty.
</td></tr><tr valign='top'><td>Home is where the Heart Lies</td><td>Find Radiant's room.
</td></tr><tr valign='top'><td>Hurried Heroine</td><td>Complete the game within one week.
</td></tr><tr valign='top'><td>In Loving Memory</td><td>Find the Hero6 room.
</td></tr><tr valign='top'><td>Jack of All Trades</td><td>Complete the game with all three classes.
</td></tr><tr valign='top'><td>Legendary Rogue</td><td>Complete the game as rogue.
</td></tr><tr valign='top'><td>Legendary Sorceress</td><td>Complete the game as sorceress.
</td></tr><tr valign='top'><td>Legendary Warrior</td><td>Complete the game as warrior.
</td></tr><tr valign='top'><td>Loki's Trickster</td><td>Deal with violent situations without using violence.
</td></tr><tr valign='top'><td>Master Rogue</td><td>Reach chapter 4 as rogue.
</td></tr><tr valign='top'><td>Master Sorceress</td><td>Reach chapter 4 as sorceress.
</td></tr><tr valign='top'><td>Master Warrior</td><td>Reach chapter 4 as warrior.
</td></tr><tr valign='top'><td>Menace to Society</td><td>Spend your life in jail.
</td></tr><tr valign='top'><td>Most IMPressive</td><td>Get killed in Quest For Yrolg.
</td></tr><tr valign='top'><td>My Kung Fu is Stronger</td><td>Prove yourself a better guardian than Sigurd.
</td></tr><tr valign='top'><td>Paladin</td><td>Obtain Balmung.
</td></tr><tr valign='top'><td>Paragon Heroine</td><td>Complete the game with 100 honor.
</td></tr><tr valign='top'><td>Shadows of Darkness</td><td>Deliver the svartalf crystal.
</td></tr><tr valign='top'><td>Silver Medal</td><td>Win a moderate victory in the Test of Fate.
</td></tr><tr valign='top'><td>So You Want To Be A Heroine</td><td>Find your first food.
</td></tr><tr valign='top'><td>Trial by Fire</td><td>Defeat Surtr.
</td></tr><tr valign='top'><td>Ultimate Rogue</td><td>Reach maximum score as rogue.
</td></tr><tr valign='top'><td>Ultimate Sorceress</td><td>Reach maximum score as sorceress.
</td></tr><tr valign='top'><td>Ultimate Warrior</td><td>Reach maximum score as warrior.
</td></tr><tr valign='top'><td>Wages of War</td><td>Win the battle for Munarvagir.
</td></tr><tr valign='top'><td>What a Workout!</td><td>Maximize your primary stats.
</td></tr><tr valign='top'><td>Where it All Began</td><td>Get slain by Elsa.
</td></tr><tr valign='top'><td>Wiser than the Wizard</td><td>Prove yourself a better guardian than Aurvandel.
</td></tr><tr valign='top'><td>Your Bloom is at Hand!</td><td>Befriend Ratatosk.
</td></tr></table>