Full list of all 39 Armored Core 4 achievements worth 1,000 gamerscore. It takes around 30-35 hours to unlock all of the achievements on Xbox 360.
Awarded for achieving Total Mission Rank SS
Awarded for achieving Total Mission Rank S
Awarded for completing all Hard Missions
Awarded for completing the INTERNAL PURGE mission on Hard
Awarded for completing the SILENT AVALANCHE mission on Hard
Awarded for completing the SANDSTORM CITADEL mission on Hard
Awarded for completing the LINE OF DEFENSE mission on Hard
Awarded for completing the EGO BOOST mission on Hard
Awarded for completing the JUGGERNAUT mission on Hard
Awarded for completing the SOL DIOS mission on Hard
Awarded for completing the SEED A BARREN EARTH mission on Hard
Awarded for completing the MARCHE AU SUPPLICE mission on Hard
Awarded for completing the JARDIN DE CHEVALIER mission on Hard
Awarded for completing the EMPRESS mission on Hard
Awarded for completing the SEA OF BLOOD mission on Hard
Awarded for completing the UP IN FLAMES mission on Hard
Awarded for completing the DESERT WOLF mission on Hard
Awarded for completing all Normal Missions
Awarded for achieving Total Mission Rank A
Awarded for completing all data packs
Awarded for completing the "NDP-S001" data pack
Awarded for completing the "SDGA RANK-A" data pack
Awarded for completing the "SDGA RANK-B" data pack
Awarded for completing the "NDP-E001 ROS-OME" data pack
Awarded for completing the "NDP-C001 RAY" data pack
Awarded for completing the "NDP-C002 AKV" data pack
Awarded for completing the "SDBFF RANK-A" data pack
Awarded for completing the "SDBFF RANK-B" data pack
Awarded for completing the "NDP-B001 LEO" data pack
Awarded for completing the "NDP-B002 ALD-MEL" data pack
Awarded for completing the "NDP-A001 EQB-TEC" data pack
Awarded for completing the "NDP-X002 MAGGRIB" data pack
Awarded for completing Chapter 6
Awarded for completing Chapter 5
Awarded for completing Chapter 4
Awarded for completing Chapter 3
Awarded for completing Chapter 2
Awarded for completing Chapter 1