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Browser Game with Guilds and Alliances

OGame has the deepest alliance system among browser strategy games: ACS attacks, alliance depot, Titan Clash and real alliance wars. Free since 2002.

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● Free-to-Play   ● Live since 2003   ● Active communities
Action to strategy
For every taste
Low requirements
Runs on older PCs
Active updates
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Alliances in OGame: More than Protection Groups

In many browser games, guilds or alliances are mainly protection groups: you're a member, perhaps pay a bit of resources, and formally have a "clan" behind you. In OGame alliances are more real: they have internal hierarchies, their own economic systems, diplomatic networks and fight in organised wars against each other.

The difference lies in the real consequences. A coordinated ACS attack from a well-led alliance can destroy the fleet of a top player in minutes. A strong alliance can control entire galaxy areas. This power makes alliance membership a real strategic decision.

Alliance Structure in OGame

Roles and Hierarchy

Alliance Buildings: The Alliance Depot

The alliance depot is a unique building in OGame: it enables resource transfer directly from a fleet that lands on the planet. Alliance members can thus refuel resources for fleet missions without direct detour. Well-coordinated alliances use strategically placed alliance depots as logistical bases for long-range operations.

The Alliance Combat System (ACS)

ACS is the technical foundation for coordinated group attacks. Multiple players can synchronise their fleets so that all land on a target planet at the same second. A coordinated ACS attack from 5 players with 1,000 battleships each is tactically completely different from 5 separate attacks — the combined force makes even the strongest defences and fleets surmountable.

ACS Coordination in Practice

ACS requires precise coordination:

  1. Target and attack timing are agreed upon
  2. Each participant calculates their travel time and starts correspondingly earlier or later
  3. The attack lands synchronously — all fleets arrive simultaneously
  4. Debris fields are distributed amongst participants in a coordinated manner

A successful ACS attack is often the result of hours of planning and shows the strength of a well-led alliance. It's one of the most satisfying moments in OGame.

Alliance Wars: The Political High Game

When diplomacy fails or two alliances come into conflict, alliance wars arise. These confrontations can last weeks or even months and shape the political balance of the entire universe. In an alliance war, all members of both alliances are legitimate targets — there are no newbie protection exceptions for internally agreed war goals.

The most spectacular moments in OGame universes arise in alliance wars: coordinated attacks on the strongest player of the opponent, blockades of entire galaxy areas, diplomatic splits that tear whole alliances apart.

Titan Clash: The Alliance Event

The Titan Clash is a regular event in OGame that specifically puts alliances in the foreground. Alliances compete against each other in a structured tournament atmosphere — it's the prestige event for competitive alliances and one of the main reasons why top alliances continuously optimise their members and coordination.

Events like the Titan Clash give alliances regular shared goals and prevent the alliance system from sinking into inactivity. It's a game design decision that keeps alliances alive long-term.

For Solo Players: Join an Alliance or Not?

Some players want to play completely solo. This is possible — but with real limitations. Without an alliance, you have no ACS backup when a large fleet targets the home planet. You have no information flow about active threats. You have no internal economy for resource transfers.

Most successful long-term players are in alliances — because the community around the alliance is what has kept OGame alive for 23 years. The shared experience of successes and defeats is the social core of the game.

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