Armored Core 4 is a video game for the PlayStation 3 and Xbox 360. It is the 11th installment of From Software's Armored Core series, despite being titled Armored Core 4. Armored Core 4 is set in the near future in an alternate universe where a great war has left the nations of Earth devastated and corporations have taken over the role of the government. The game features a system for personalized customization of the player's mech and an online mode where players can battle each other over the PlayStation Network and Xbox Live. The game is similar to the MechWarrior series and is the spiritual sibling to From Software's other mecha-based game, Chromehounds. An OVA due out this spring entitled Armored Core: Fort Tower Song is based on the game and its history.

Unlockables
Achievements

Complete each achievement to get the allotted gamerscore.

00-Aretha (10) - Awarded for completing the SEED A BARREN EARTH mission on Hard.

01 Berlioz (10) - Awarded for completing the MARCHE AU SUPPLICE mission on Hard.

03 Anjou (10) - Awarded for completing the JARDIN DE CHEVALIER mission on Hard.

05 Mary Shelley (10) - Awarded for completing the EMPRESS mission on Hard.

14 Sherring (10) - Awarded for completing the SEA OF BLOOD mission on Hard.

Akvavit Pack (30) - Awarded for completing the "NDP-C002 AKV" data pack.

Aldra Pack (30) - Awarded for completing the "NDP-B002 ALD-MEL" data pack.

All Data Packs (50) - Awarded for completing all data packs.

Amazigh (10) - Awarded for completing the DESERT WOLF mission on Hard.

BFF Pack-A (30) - Awarded for completing the "SDBFF RANK-A" data pack.

BFF Pack-B (30) - Awarded for completing the "SDBFF RANK-B" data pack.

Chapter 1 (20) - Awarded for completing Chapter 1.

Chapter 2 (30) - Awarded for completing Chapter 2.

Chapter 3 (30) - Awarded for completing Chapter 3.

Chapter 4 (50) - Awarded for completing Chapter 4.

Chapter 5 (50) - Awarded for completing Chapter 5.

Chapter 6 (100) - Awarded for completing Chapter 6.

Eqbal Pack (30) - Awarded for completing the "NDP-A001 EQB-TEC" data pack.

GA Pack-A (30) - Awarded for completing the "SDGA RANK-A" data pack.

GA Pack-B (30) - Awarded for completing the "SDGA RANK-B" data pack.

Hard Difficulty (50) - Awarded for completing all Hard Missions.

Leone Pack (30) - Awarded for completing the "NDP-B001 LEO" data pack.

Maghrib Pack (30) - Awarded for completing the "NDP-X002 MAGHRIB" data pack.

Mission Rank A (10) - Awarded for achieving Total Mission Rank A.

Mission Rank S (20) - Awarded for achieving Total Mission Rank S.

Normal Difficulty (50) - Awarded for completing all Normal Missions.

Rayleonard Pack (30) - Awarded for completing the "NDP-C001 RAY" data pack.

Rosenthal Pack (30) - Awarded for completing the "NDP-E001 ROS-OME" data pack.

Sol Dios (10) - Awarded for completing the SOL DIOS mission on Hard.

Sus (10) - Awarded for completing the UP IN FLAMES mission on Hard.

Ursragna (10) - Awarded for completing the JUGGERNAUT mission on Hard.

The final mission on the Hard difficulty level: