Here is the full list of all 50 Risen achievements.
"Defeat the Titan!" completed
"The Inquisitor is dead!" completed
"The fourth seal of rune magic" completed
All crystals learned
Every ranged combat talent learned
Every close combat talent learned
100% achieved in three attributes
100% achieved in an attribute
300,000 gold coins obtained
2000 monsters killed
100,000 gold coins obtained
"Find all the teleport stones" completed
"The Titan trap" completed
"Secure the volcano keep" completed
25 Jest spells used
"The test of Master Ignatius" completed
Find Helmar's murderer completed
"Pease and order" completed
100 weapons forged
Every Crafting profession learned
"Esteban's return to Harbour Town" completed
20 tool bags collected in inventory
Rescued the orge, Drok
"Where is Patty?" completed
Caught by the tideworm 10 times
"Find all the vassal rings" completed
"The mystery of the eastern temple" completed
"The legend of the Gyrger" completed
"The sons of Tilda" completed
Fell to death 3 times
"A package for the Don" completed
"Woman beater" completed
The farmer's sick wife completed
"Medicine for everyone" completed
50 pockets picked
"Power struggle" completed
1000 gold coins obtained
100 locks picked
10 treasures found
Found first bow
10 grain plants collected
20 chickens killed
"Rescue Sara from the wilderbess" completed
Found first map in the game
20 wild boars killed
Found way out of the first ruin
Seven grave moths killed
500 monsters killed
First monster killed
250 quests completed