Make a 400 ducat donation at a temple, then pray for a miracle to bring back a party member from death. You can then reload a saved game to get your money back and continue.
Save the game, then purchase a Battle Axe from a well-stocked weapon shop, such as the one in Tyldon. Equip the axe on a character and enter combat. After earning the achievement, reload the saved game file to get a refund on the axe.
Enter the "crumbling inn" (also known as the "abandoned hostel" or "tumbledown inn") optional dungeon located halfway between Daspota and Ottarje. After entering one of the last rooms on the second floor, you will get an option to interrupt a summoning. Do so to earn the achievement.
Enter a tavern and find the table with four wooden mugs on it in front of the bartender. Select the third mug from the left. Instead of showing the usual action menu, you will hear the "Die Barbaren sind frei" tavern song.
Find the magical chainmail in a cave on Runinshavn island that has the description "This Chainmail is cursed! It only protects against the undead, and causes constant physical pain for the wearer". Equip that armor and enter battle with it. The curse only lower's the chainmail's AR value to 2, and can be unequipped as desired.
You need to run out of time before completing the main quest. The game starts on 24th of Travia, 1008, and your deadline occurs on 27th of Peraine, 1010 which is a total of 30 in-game months. Completing all quests and dungeons (including those from DLC) can be completed in about ten months. Note: "Brother of the Orks" cannot be earned if you travel to the designated place early, choose the menu option to wait there until the Orcs arrive, then lose the final battle. If you are finished early, to advance time, sleep at an inn one day at a time. Note: You may also need to use the "Buy food and water" option every five days. To do this easier, start by sleeping until early morning to align the sleep cycle. Then the next time you sleep, the sleep duration prompt will default to 24 hours, which is the maximum amount. As an added benefit, this also lets you sleep another 24 hours without having to reserve the room again.
While in a camp, hunt for food and water. If your party members are not hungry enough to eat everything, the leftovers will be turned into a various amount of food supply packs. Note: The random stag, boar, and rhino hunting events that occur while travelling will not qualify.
There are fifteen dungeons in the main game, in the following locations. DLC quest areas will not qualify.
During character generation, roll a fighter and modify the strength stat up to 13. Upon every level-up, increase strength by 1. The spell "Attributo" can temporarily raise your strength by +1. ST Elixir potions will increase strength by +5. Loot the corpse near the entrance of the "A cave" dungeon on Runinshavn island to get a Belt of Strength that increases strength by +3.
You will encounter a pack of griffins blocking the path halfway between Phexcaer and Hermit's Lake. Try to negotiate with them and they will take a party member as a sacrifice unless you answer the riddle "Unbroken, it is what moves all, but take half away and it is the end". The correct answer is "Wheel".