Huge Open-World Maps in Survival Games: How Big Is Big, and Does Size Matter?

A huge open-world map is a promise that only means something in time and density. Square kilometres sound large and say very little: what matters is how long it takes to get anywhere, and what is worth doing when you arrive. This page translates map size into walking time, explains the four ways studios build big maps, separates open world from sandbox and gives you five questions to test a claim. We end with how COLONIZED, a space survival MMORPG for PC with a closed alpha first waves planned for winter 2026-2027, approaches scale.

Map size in walking time

Walking pace is about 5 km/h. At that pace:

Distance	Time on foot
1 km	12 minutes
10 km	2 hours
100 km	20 hours
1,000 km	200 hours
Earth’s equator, about 40,075 km	about 8,000 hours, or roughly 334 days without stopping

The figures for Earth are from NASA’s fact sheet: circumference about 40,075 km, surface area about 510 million km². A “huge” map in games is usually between a few and a few hundred square kilometres, which is well under a millionth of the Earth’s surface. That does not make it small; it makes “huge” a relative word. Always ask: huge compared to what, and how do you cross it?

Four ways to build a big map

Method	How it works	Strength	Weakness
Hand-built	Artists place everything	Authored, memorable places	Slow and expensive; limits the size
Procedural	Rules generate terrain and placement	Scale at low cost	Can feel repetitive without good rules
Streamed, one continuous world	One continuous world loaded in pieces	No visible seams	Hard engineering, memory and streaming costs
Stitched zones	Separate maps connected by gates	Controlled load and cost	Seams between zones

Many games mix them: hand-built landmarks in a procedural world. What matters for a survival player is whether the generation follows rules that make sense, such as where water is, where rock is and where the air is thin, or whether it is noise with props.

Size is not density

A map can be big and empty or small and full. A rough test of density is how many minutes pass between interesting decisions. In a survival game, that might be a resource, a threat, a place worth building on or another player. If the answer is “an hour of walking,” the size is working against you.

Two things help density without shrinking the map: fast travel with a cost (so distance still matters) and meaningful regions (so that a different place offers different things).

Open world, sandbox, survival

Term	The freedom it describes	Example of what it implies
Open world	Freedom of movement across a large connected space	You can go in any direction
Sandbox	Freedom of action, with tools to alter the world	You can build, dig and rearrange
Survival	Rules of need and risk	The world pushes back

A survival game with an open world and sandbox tools is the most common blend. The question is which freedom the game protects when they conflict.

What changes in multiplayer

In a persistent multiplayer world, the map also has to remember what players did to it: bases, changes to terrain and stock. Storage and network costs grow with how much players can change. That is part of why big persistent maps are rarer than big single-player ones. Our guide to hundreds of players per server covers the player side.

Five questions to test a map claim

1. How long does it take to cross it? A figure in minutes or hours, not square kilometres.
2. Is it one continuous space or several maps? Seams and loading are part of the honest answer.
3. Is it generated or hand-built? Both can be good; the answer tells you what to expect.
4. What lives on it? Resources, creatures, places and other players.
5. What does it remember? Does what you build stay?

What a map should tell you in the first ten minutes

A good big map explains itself. In your first ten minutes you should know three things: which way to go (a landmark, a horizon or a marker), what is out there (a hint at resources, threats or places) and what going costs (time, risk or supplies). If you only learn that the map is large, the design has not done its job. Ask for unedited early play to see whether it does.

How COLONIZED approaches scale

COLONIZED is built around one star system, Aurin, and is designed around Earth-sized planets. In the development build, worlds are spheres with gravity that points to their centre, and outside the atmosphere there is zero gravity; fifteen worlds are generated from their lore (four planets, ten moons and a captured asteroid), with terrain from real elevation data and physics and weather of their own. They are under visual review. We do not promise that you will explore a whole planet in the alpha; what each wave includes will be announced in the alpha notes. The reasoning behind the scale is in playable solar systems, and the technique in how COLONIZED builds fifteen worlds from lore. Every figure we can publish is in the Aurin system in numbers.

In short: the size of a map is a promise about time, and the density of a map is a promise about attention. A game that states both, in minutes and in things to do, is telling you something you can check.

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