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