Here is the full list of all 18 Assassin's Creed Chronicles: India achievements worth 1,000 gamerscore.
Have 100 enemies pass by you whilst using Helix Blend.
Dispose of 100 enemies using Helix Blade.
Multi kill 200 enemies.
Complete Assassin's Creed® Chronicles: India without killing anyone.
Achieve Assassin Gold Style rating 30 times.
Complete Assassin's Creed® Chronicles: India in Plus Hard mode without being seen once.
Clear the Mortar Guards in Memory Sequence 8 without taking any damage.
Achieve Silencer Gold Style rating 30 times.
Take down 100 enemies.
Pickpocket or Loot 100 enemies without being seen.
Use the Smoke to pass by 100 enemies.
Complete Assassin's Creed® Chronicles: India.
Complete Memory Sequence 9 in under 7 minutes.
Complete Memory Sequence 4 in under 9 minutes.
Achieve Shadow Gold Style rating 30 times.
In Memory Sequence 3, rescue Hamid in under 5 minutes.
Complete Memory Sequence 1.
Reach the maximum score multiplier in any memory sequence and maintain it for two more sections.