Full list of all 70 Ninja Gaiden II achievements worth 1,250 gamerscore. It takes around 80-100 hours to unlock all of the achievements in the base game.
The base game contains 60 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 10 achievements worth 250 Gamerscore.
Completed the game using only the Falcon's Talons.
Completed the game using only the Kusari-gama.
Completed the game using only the Dragon's Claw and Tiger's Fang.
Completed the game using only the Lunar Staff.
Completed the game using only the Tonfa.
Purified the site of the the ninth Test of Valor.
Completed the game using only the Vigoorian Flail.
Purified the site of the the fourth Test of Valor.
Completed the game using only the Eclipse Scythe.
Purified the site of the the eighth Test of Valor.
Purified the site of the the seventh Test of Valor.
Purified the site of the the sixth Test of Valor.
Purified the site of the the fifth Test of Valor.
Purified the site of the the third Test of Valor.
Purified the site of the the second Test of Valor.
Finished walking the Path of the Master Ninja.
Defeated 1000 enemies with Obliteration Techniques.
Defeated 1000 enemies with Ultimate Techniques.
Purified the site of the the first Test of Valor.
Finished walking the Path of the Mentor.
Obtained all of the Crystal Skulls.
Completed the game using only the Dragon Sword.
Finished walking the Path of the Warrior.
Finished walking the Path of the Acolyte.
Annihilated the High Infernal Priest, Dagra Dai.
Annihilated Elizébet, the Greater Fiend of Blood.
Freed Genshin's soul and ended the reign of the Black Spider Clan.
Annihilated Alexei, the Greater Fiend of Lightning.
Annihilated Volf, the Greater Fiend of Storms.
Annihilated Zedonius, the Greater Fiend of Flame.
Defeated Genshin, leader of the Black Spider Clan.
Obtained 20 Crystal Skulls.
Defeated the Greater Fiend Elizébet.
Successfully mastered the Art of the Flame Phoenix Ninpo.
Finished Chapter 9, "Heart of Darkness."
Defeated the Greater Fiend Zedonius.
Obtained 10 Crystal Skulls.
Finished Chapter 7, "The Flying Fortress Daedalus."
Successfully mastered the Art of the Piercing Void Ninpo.
Defeated the Greater Fiend Volf.
Chose to continue the game 100 times.
Achieved a 100-hit combo.
Finished Chapter 5, "The Aqua Capital."
Defeated the Greater Fiend Alexei.
Finished Chapter 3, "Thunderclap of Catastrophe."
Successfully mastered the Invisible Path technique.
Successfully mastered the Reverse Wind technique.
Successfully mastered the Furious Wind technique.
Successfully mastered the Shadowless Footsteps technique.
Successfully mastered the Flying Swallow technique.
Successfully mastered the Flying Bird Flip technique.
Successfully mastered the Obliteration Technique.
Successfully mastered the Ultimate Technique.
Successfully mastered the Ultimate Guidance technique.
Successfully mastered the Counter Attack technique.
Successfully mastered the Unrivaled Soaring technique.
Successfully mastered the Art of the Inferno Ninpo.
Successfully mastered the Art of the Wind Blades Ninpo.
Finished Chapter 1, "Sky City Tokyo."
Finished Chapter 2, "The Castle of the Dragon."
Obtained all Gold Medallions in the Survival Missions
Obtained all Silver Medallions in the Survival Missions
Obtained all Bronze Medallions in the Survival Missions
Completed all Karma Attack Missions on Path of the Master Ninja
Completed all Karma Attack Missions on Path of the Mentor
Completed all Karma Attack Missions on Path of the Warrior
Completed all Karma Attack Missions on Path of the Acolyte
Obtained a Medallion in a Survival Mission
Completed 8 Missions
Completed 4 Missions