Gameforge · Top Free-to-Play

Games like Space Invaders with Strategy

Do you love space games and want more strategy than Space Invaders? OGame is the deepest space strategy game in your browser — free, no download required.

Discover games
● Free-to-Play   ● Live since 2003   ● Active communities
Action to strategy
For every taste
Low requirements
Runs on older PCs
Active updates
Regular content

When space arcade isn't enough anymore

Space Invaders defined the space gaming genre: shooting aliens, surviving waves, chasing high scores. But once you've discovered the fascination of space, you often want more: real strategy, persistent worlds, other players as opponents — and decisions that still have consequences hours or days later.

OGame is exactly this "more". Since 2002 it has offered the deepest space strategy game in your browser. No high score lists, no wave mechanics — instead a living galaxy with thousands of real players, alliances, wars and economy.

What distinguishes space strategy from arcade

AspectArcade (Space Invaders style)OGame Strategy
OpponentsAI wavesReal players worldwide
Play timeMinute sessionsDay to month-long campaigns
DecisionsDodge, shootResources, research, fleet, timing
EconomyNoneMetal, crystal, deuterium cycle
ExpansionNonePlanets, moons, colonies
CommunitySingle player / leaderboardAlliances, wars, ACS attacks
Learning curveFlat — quickly understandableMedium — deep and long-term rewarding

OGame's space strategy in detail

Planet building as foundation

OGame starts with a home planet. On it you build metal mines, crystal mines and deuterium synthesisers to produce resources. With resources you advance research: energy technology, propulsion systems, weapons technology, astrophysics. Astrophysics enables new colonies — up to 9 planets plus moons can be settled.

The fleet — OGame's heart

Ships are built in the shipyard. Light fighters as mass production, heavy fighters for stronger engagements, cruisers, battleships, battlecruisers, bombers, destroyers — and as the crowning glory the Death Star, the most powerful ship in the game that can even destroy moons. Each ship has strengths and weaknesses in the rapidfire system: cruisers shoot multiple times at light fighters, bombers demolish defence installations.

Fleetsave — the strategic core mechanic

What makes OGame unique is fleetsave: before going offline, you send your own fleet on a mission whose arrival time matches your own waking time. The fleet is untouchable during travel. This simple mechanic creates complex strategic thinking: when am I online? How long does the mission last? Which resources do I take with me?

Expeditions into the unknown

The discoverer class can send fleets to unexplored areas. What comes back? Resources, foreign ships, dark matter, pirates or simply nothing. This random mechanic creates tension and income variance — a space exploration system that arcade games cannot offer.

Three classes for three play styles

OGame offers a choice between three classes when registering that completely determine the gaming experience:

Perfect for space fans who want more

OGame is ideal for players who love space themes but are bored by arcade formats. Browser access means: no download, no installation, playable on any device — but with strategic depth that console space games often don't achieve. Once you sink into OGame, you'll find a community that has been active for over 20 years.

Try them out — all free

No credit card, no subscription. Pick your favourite.

All Gameforge games

More Gameforge worlds

All free — action, strategy, anime

Oriental Action MMORPG
Metin2
Sci-Fi Strategy
OGame
Antike Strategie
Ikariam
USK 12 PEGI 12   © 2002–2026 Gameforge 4D GmbH