Arena in Armored Core 6 (AC6) is a game mode where you can fight against AI enemies while progressing through the main plot and story. Additionally, fighting in the Arena gives you access to exclusive rewards that cannot be received through the story mode or the multiplayer mode. However, you can only access the Arena and the OS Tuning menu by completing the 05-A Retrieve Combat Logs or the 05-B Investigate Baws Arsenal No. 2 missions.
- The Arena is a game mode in Armored Core 6 where players can test their combat aptitudes against AI ACs.
- Players gain exclusive rewards such as AC build presets, COAM, and OST Chips in Armored Core 6 from the opponents they defeat in the arena.
- There are a total of twenty-nine fights within the arena, which are organized into seven ranks with increasing levels of difficulty.
- You can unlock each rank of encounters after completing specific story missions.
- It will take almost one complete playthrough of the whole story to complete all Arena fights.
Arena Encounters And Rewards In Armored Core 6
Here is a list of all Arena Encounter Ranks, their unlock points and rewards:
Encounter Rank | Unlock Mission | Number of Fights | Rewards |
---|---|---|---|
Rank F | 05-A Retrieve Combat Logs or 05-B Investigate Baws Arsenal No. 2 | Three | COAM: 35000- 40000/ An Emblem and a Build Data Preseet for each fight/ Two OTS Chips |
Rank E | Attack The Watch Point | Four | COAM: 43000- 50000/ An Emblem and a Data Preset for each fight/ Two OTS Chips |
Rank D | Ocean Crossing | Six | COAM: 52000- 62000/ An Emblem For each Fight and a Data Preset for each fight/ Three OTS Chips |
Rank C | Atttack The Refuling Base | four | COAM: 64000- 70000/ An Emblem For each Fight and a Data Preset for each fight/ Three OTS Chips |
Rank B | Attack The Old Space Port | Five | COAM: 72000- 80000/ An Emblem For each Fight and a Data Preset for each fight/ Four OTS Chips |
Rank A | Destroy The Ice Worm | Five | COAM: 83000- 95000/ An Emblem For each Fight and a Data Preset for each fight/ Four to Six OTS Chips |
Rank S | Underground Exploration Depth 3 | Two | COAM: 97000- 100000/ An Emblem For each Fight and a Data Preset for each fight/ six OTS Chips |
What Are Arena Encounters

The Arena in Armored Core 6 is a combat evaluation game mode by the AI system ALLMIND. Here, you can battle against simulated mercenary ACs in a controlled environment. These battles (encounters) are classified into seven ranks (F, E, D, C, B, A, S) with increasing difficulty levels.
- Completing each fight gives you OS Tuning (OST) Chips for use in the OS Tuning menu to gain additional skills for your AC.
- You also receive COAM and an Emblem for every fight.
- A preset build of every AC you defeat is also rewarded so you can test and modify the mercenary build for yourself.
- Each set of ranked encounters is unlocked after you complete certain missions in the main story of AC6.
Arena Encounter Rewards In Armored Core 6

The rewards for every Arena Encounter can vary depending on their difficulty setting (rank). The higher the difficulty, the greater the reward for defeating each enemy. Generally, the OS chip rewards remain identical within the same encounters. However, the COAM rewards and builds data that you receive will increase in quantity and quality for each successive opponent.
Some of the build data sets you receive at the later stages of the arena will rival the best PVP build in AC6, making them a very valuable resource.
F Rank Encounters
You will have access to the Rank F arena encounters in Armored Core 6 as soon as you unlock the Arena game mode. Each battle in Rank F will reward you with two OST chips upon completion. There are three F-rank mercenary encounters in AC 6.
Here are the detailed rewards for each fight:
Opponent Name | Rewards |
“Invincible” Rummy | COAM: 35000, Mad Stomp Emblem, “Invincible” Rummy Data Preset |
Index Dunham | COAM: 37000, Burn Pickaxe Emblem, Index Dunham Data Preset |
G6 red | COAM: 40000, Hermit Emblem, G6 Red Data Preset |
E Rank Encounters
The E Rank Encounters in Armored Core 6 Arena are unlocked after completing the “Attack The Watchpoint.” You get OST chips (two) on successful completion of every encounter in this rank. There are a total of four encounters within this rank.
Here is what you get after each battle:
Opponent Name | Rewards |
Nosaac | COAM: 43000, Bitter Promise Emblem, Nosaac Data Preset |
V.VI Maeterlinck | COAM: 45000, Infection Emblem, V.VI Maeterlinck Data Preset |
Little Ziyi | COAM: 47000, Yue Yu Emblem, Little Ziyi Data Preset |
V.VII Swinburne | COAM: 50000, Guidance Emblem, V.VII Swinburne Data Preset |
D Rank Encounters
This set of battles becomes available after clearing the “Ocean Crossing” mission in the main story. Every fight in this rank will give you three OST Chips, various data presets, and COAM.
There are six total encounters in this rank with the following rewards:
Opponent Name | Rewards |
G3WU Huahai | COAM: 52000, Li Long Emblem, G3WU Huahai Data Preset |
Ring Freddie | COAM: 53000, Candle Ring Emblem, Ring Freddie Data Preset |
V.V Hawkins | COAM: 56000, Reconfig Emblem, V.V Hawkins Data Preset |
G5 Iguazu | COAM: 58000, Head Bringer Emblem, G5 Iguazu Data Preset |
Rokumonsen | COAM: 60000, Shinobi Emblem, Rokumonsen Data Preset |
G4 Volta | COAM: 62000, Cannon Head Emblem, G4 Volta Data Preset |
C Rank Encounters
The C Rank Encounters in Armored Core 6 Arena are unlocked after the “Attack The Refueling Base” mission. The OST Chip reward for each C Rank encounter is three chips per encounter.
Just like E Rank, there are four battles in this bracket with the following rewards:
Opponent Name | Rewards |
V.VIII Pater | COAM: 64000, Dual Nature Emblem, V.VIII Pater Data Preset |
Sulla | COAM: 66000, Entrange Emblem, Sulla Data Preset |
“Chatty” Stick | COAM: 68000, Circus Emblem, “Chatty” Stick Data Preset |
Middle Flatwell | COAM: 70000, Tsubasa Emblem, Middle Flatwell Data Preset |
B Rank Encounters
You can participate in the B Rank Arena Encounter in Armored Core 6 after completing the “Attack The Old Space Port” mission in the main storyline. Every opponent in B Rank fights will give you four OST Chips. There are five B Rank Encounters in total.
Here are the rewards for every B rank fight:
Opponent Name | Rewards |
V.III O’Keeffe | COAM: 72000, Barren Emblem, V.III O’Keeffe Data Preset |
“Cinder” Carla | COAM: 74000, Full Course Emblem, “Cinder” Carla Data Preset |
Coldcall | COAM: 76000, Deadsled Emblem, Coldcall Data Preset |
V.IV Rusty | COAM: 78000, Steel Haze Emblem, V.IV Rusty Data Preset |
Honest Brute | COAM: 80000, Milk Tooth Emblem, Honest Brute Data Preset |
A Rank Encounters
A Rank is the second highest rank of Armored Core 6 Arena mode, with five fights in total. You must complete the “Destroy The Ice Worm” mission to unlock all battles in this rank. Each fight in A Rank rewards you with four OST Chips (except for King, which gives you six OST chips), COAM, and your opponent’s data presets.
Here are the detailed rewards for each fight:
Opponent Name | Rewards |
G2 Nile | COAM: 83000, Deep Down Emblem, G2 Nile Data Preset |
V.II Snail | COAM: 85000, Open Faith Emblem, V.II Snail Data Preset |
Chartreuse | COAM: 87000, Umber OX Emblem, Chartreuse Data Preset |
Thumb Dolmayan | COAM: 90000, Astghik Emblem, Thumb Dolmayan Data Preset |
King | COAM: 95000, Aster Crown Emblem, King Data Preset |
S Rank Encounters
The S Rank is the last set of encounters you can play before playing through the whole game and entering the New Game+. This is the highest achievable rank level in the normal game. Furthermore, Rank A and Rank S encounters will have some of the best builds in AC6. With two battles, both opponents in S Rank Encounters drop six OST Chips Each.
Let’s look at the individual loot for each opponent:
Opponent Name | Rewards |
G1 Michigan | COAM: 97000, Ligar Tail Emblem, G1 Michigan Data Preset |
V.I Freud | COAM: 100000, Locksmith Emblem, V.I Freud Data Preset |
Armored Core 6 Arena In New Game+

After you complete your first playthrough of Armored Core 6, you will start again from the beginning of the story with your collected items. Here, you will get to play through the entire game once again. The New Game+ will have additional missions and content in it. The Armored Core 6 Arena menu will also appear with a new analysis tab. You can fight additional mercenary ACs on an even higher difficulty for greater rewards.
The Armored Core 6 Arena game mode is a battle simulator that allows you to farm COAM and OST Chips for your Armored Cores. There are twenty-nine simulated fights against different enemies of increasing difficulty in the first playthrough—the rewards for clearing each battle increase with the difficulty level.
If you want to learn more about Armored Core 6, try reading about all the stats in AC6 or how to beat Cel 240 in the main story. If you are having trouble progressing through the early game, try learning about the best parts of AC6.
Next:
Image Credits: FP Good Game and Gamer’s Little Playground
Thanks! Do share your feedback with us. ⚡
How could we improve this post? Please Help us. ✍