Here is the full list of all 55 Wulverblade achievements.
Find eight secret areas in one session
Defeat the level 6 boss without losing a life
Kill 10 enemies during a single rage
Defeat Bronwen without losing a life
Defeat Arthal without losing a life
Impale 1000 enemies on spikes
Kill 5000 enemies
Impale 100 enemies on spikes
Defeat the level 1 boss without losing a life
Defeat the praefectus without losing a life
Finish off 50 enemies with executions
Hit 100 enemies with throwing knives
Counter 100 times
Counter 50 times
Hit 5 enemies with one ground slam or heavy weapon jump slam
Find the Golden Axe
Earn rank 3 on all campaign levels
Impale 25 enemies on spikes
Complete all levels under par time
Hit 5 enemies at once with a single exploding barrel
Spared the sleeping Roman in Fort Bremenium
Destroyed 1000 amount of Destructables
Complete Stage 5 in Arcade mode
Complete Stage 4 in Arcade mode
Complete Stage 3 in Arcade mode
Complete Stage 2 in Arcade mode
Defeat the level 2 bosses without losing a life
Complete Stage 1 in Arcade mode
Reach wave 10 in an arena
Find one secret area
Have a hot roasted turkey or ham when your health is already full
Kill 1000 enemies
Transformed into the Wulver for the first time
Hit 100 enemies with dismembered pieces
Find 25 history unlocks
Kill 500 enemies
Destroyed 100 amount of Destructables
Kill 3 enemies with fire within 10 seconds
Find 10 history unlocks
Kill 250 enemies
Kill 100 enemies
Build up a 100 hit streak
Build up a 25 hit streak
Defeat the Primus Pilus without losing a life
Reach wave 20 in an arena
Reach wave 30 in an arena
Build up a 300 hit streak
Complete arcade mode of the campaign
Complete Stage 6 in Arcade mode
Complete Stage 7 in Arcade mode
Beat the game in any mode as Caradoc
Beat the game in any mode as Brennus
Beat the game in any mode as Guinevere
Finish off 250 enemies with executions
Counter 500 times