During the journey you can encounter chests, which can be opened after providing a password. Here is the list of answer to all riddles:
Riddle chest: History is told, forgotten and can be told again. What is put on parchment never remains unchanged. Always truth can be washed away and rewritten, but the spectre of past words seldom completely fades.
Riddle chest: While I don't walk, swim or fly. Before I fade I still wander. I shed tears even if I don't cry, But what am I? That I wonder.
Riddle chest: I am so simple, that I can only point, Yet I guide men all over the world.
Riddle chest: I am known both young and old, Some cower from me, others I make bold, but I'm not one you mock or taunt, For your every step I hunt.
Riddle chest: I have a head, I have a tail. But I haven't got a body. What am I?
Riddle chest: Strong or weak, they all soon learn, That I dwell within the hearts of men, In darkness I rule but retreat from light. I don't need hands to grasp your tight
Riddle chest: What does man love more than life, Hate more than death or mortal strife; That which contented men desire; The pore have, the rich require; The miser spends, the spendthrift saves, and all men carry to their graves?
Riddle chest: What three letters make a man a boy?
Riddle chest: What is always too late?
Riddle chest: What is its name?
Riddle chest: Who has a hat but no head, a foot but no shoe?
Riddle chest: This engulfing thing is strange indeed. The greater it grows, the less you see.
Riddle chest: Completely round is fairly rare. Bright and shiny when I'm there. When I'm not, they call me new. But I'm old. Older than you.
Riddle chest: What runs smoother than any rhyme, Loves to fall but cannot climb?
Riddle chest: What is not enough for one, Just right for two, Too Much for three?
Riddle chest: One shadow. No Honour. No Glory. No Mercy. So many Terrors are buried in this Tomb.