Here is the full list of all 35 Relics 2: The Crusader's Tomb achievements.
Complete the Prologue without any allies dying.
Complete the Prologue but lose an ally.
Escape the clutches of an old nemesis in London.
Solve a mystery in Canterbury Cathedral without asking for help.
Decipher clues on an ancient map without any help from your companions.
Help Zhu take care of his business.
Get into a forbidden place without being seen or raising the alarm.
Make a real mess of an elaborate criminal enterprise.
Solve a riddle in an ancient tome without taking a single false step.
Some just take time for the reward to come through.
Reach a well-protected objective without alerting the authorities.
Fuck it, why not?
Survive a deadly encounter without killing any of the wildlife.
Eat the mystery meat.
Discover the shocking secrets of a prominent family.
Solve the final riddles with no help from your companions.
Sacrifice Esme to save Abdul.
Sacrifice Abdul to save Esme.
Solve a fiendish puzzle just in the nick of time.
Save an unexpected savior.
Take varied modes of transport once your journey gets underway.
Keep the same vehicle from early to late in the game.
Make a lot of profit from buying and selling trade goods.
Collect every document in the game.
Offer some small consolation to a grieving friend.
Make sure your companion's efforts don't go unrewarded.
Allow your companion's efforts to go unrewarded.
Win the competition alone.
Win the competition jointly and split the reward.
Allow someone else to claim the victory.
Engineer it so the prize goes to someone deserving.
Engineer it so the prize goes to someone undeserving.
Successfully romance a decadent hedonist.
Successfully romance an underworld legend.
Successfully romance a morally questionable rival.