# Spacewar 480: Opening Steam’s Little Multiplayer Test Game

> A January 2025 look at the launch link, menus and space-combat game.

Canonical page: https://pyrosoft.pro/blog/the-secret-steam-game-you-already-own-spacewar-480-eecc2e24

Published: 2026-11-04

Steam has a small game that is easy to miss if you only browse the store. In this January 2025 video, I open Spacewar, app 480, and take a look at the game and networking menus.

## The launch link from the video

The original description supplies `steam://run/480`. In the recording, opening that link prompts Steam to install the game, then I launch it from its page.

I show a small download in that session. Its displayed size is a historical observation, not a promise about what Steam will offer now.

## A game built around a development example

I explain Spacewar as a way for developers to test Steam networking features. The menus include local-network and internet options, lobbies and a way to start a server.

There is a playable space-combat game behind those menus too. I describe the ship, shooting and the gravitational hazard in the middle, which is what makes the little example more interesting than a bare connection test.

## Multiplayer is the idea to try next

I talk about connecting another computer or playing with a friend. The recording does not establish a completed two-player session, nor does it make the networking sample a general test of every game's multiplayer behavior.

It is a fun small detour from the usual library, and a glimpse of the development side of Steam. The exact original launch link is preserved above as text.