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