Here is the full list of all 32 Dynasty Warriors: Strikeforce achievements worth 1,000 gamerscore.
Completed Chapter 1 in any Story.
Completed first online Quest.
Made first Orb.
Acquired first Chi Skill.
Used first Card Tactic.
Issued first command to Allied Officer.
Connected to Online City for the first time.
Defeated first Weaponry.
Made first weapon.
Powered up first weapon.
Completed first Quest.
Defeated first Officer.
Defeated first rank and file soldier.
Gain all achievements.
Trade Officer with another player for the first time.
Complete Chapter 2 in any Story.
Complete Chapter 3 in any Story.
Complete Chapter 4 in any Story.
Complete Wei's Story.
Complete Wu's Story.
Complete Shu's Story.
Complete Chapter 6 in any Story.
Complete all Quests.
Collect all Weapons.
Collect all Chi Skills.
Collect all Orbs.
Collect all Officer Cards.
Collect all Treasures.
Collect all Legends.
Upgrade all City Facilities to maximum.
Use all Card Tactics.
Reach Level 50.