OGame ACS Attack 2026

What is the Alliance Combat System?

The ACS (Alliance Combat System) is one of the strongest social mechanics in OGame. It allows players from the same alliance to combine their fleets into a combined attack. Instead of attacking individually and separately, all participating fleets fight in a single combat simulation against the target.

ACS opens strategic possibilities that are closed to solo players: Targets that a single fleet cannot crack become breakable through combined firepower. At the same time, ACS distributes the risk — those who attack together also share the losses across multiple fleets.

ACS Basic Mechanics: How it works

The attacker (initiator) starts a normal attack on the target. Other alliance members can join this attack — but only if they arrive at the target on time. All ACS participants must arrive at the target at exactly the same time.

This is where the biggest challenge lies: Coordination. Players from different parts of the universe have different flight times. ACS-Hold solves this problem.

ACS-Hold Explained

ACS-Hold is the key technique for successful alliance attacks. A player sends their fleet on the "Deploy" mission to a moon or planet of an alliance member near the target. The fleet waits there. When the main attack starts, the waiting fleet departs from the nearby moon simultaneously and arrives in sync.

The advantage: Players from distant galaxies can still attack on time — by positioning their fleet in advance. A well-planned ACS attack can synchronise fleets from different galaxies to the second.

Step-by-Step: Planning an ACS Attack

1. Spy the target: Detailed espionage report with research level, ships, defence
2. Combat simulation: Check if the ACS attack is winnable and profitable
3. Recruit participants: Invite alliance members — who has the right fleet and is online?
4. Set arrival time: Everyone calculates their flight time from their respective starting point
5. Set up ACS-Hold: Players with long flight times position their fleets in advance
6. Start attack: Main attacker initiates, all other fleets start simultaneously
7. Send recyclers: Secure debris field immediately after combat

Loot Distribution and Debris Field

After a won ACS battle, the looted resources are divided proportionally to the combat value of the participating fleets. Whoever brought the stronger fleet gets a larger share of the loot. This automatic distribution is fair and transparent — you see your share directly after the battle.

The debris field, however, is not an automatically divided resource pool. Whoever arrives first with recycler fleets collects. That's why it's important to send recyclers with the attack or dispatch them immediately afterwards. Well-coordinated alliances clarify in advance who will collect the debris field.

ACS Defence: Defending Together

The ACS system also works defensively. When a player is attacked, alliance members can send reinforcements. Reinforcement fleets fight on the defender's side — including the defending planet's defences. A well-coordinated ACS defence alliance can defeat a significantly stronger attacker.

When is ACS Defence Worth It?

• When the attacked player has valuable resources or ships to lose
• When the alliance is fighting a strong opponent who attacks regularly
• When multiple alliance members are within range and can respond
• As a psychological signal: "We defend each other"

Common ACS Mistakes

• Wrong arrival time: Fleet arrives too early or too late — fights alone
• No fleetsave for participants: Attacking fleets land on home planet after battle and are vulnerable
• No recyclers planned: Debris field is left behind or the enemy collects it themselves
• Outdated espionage report: Enemy has fleet in fleetsave — battle becomes unprofitable
• Too few participants: ACS attack started, but nobody joins