It's the year 2351, and you're a pilot trying to rise through the ranks all the way to glory. As a member of the Galactic Federation, you'll be granted more than 20 weapons to use in each pass-fail mission. Your goal is to defend the planet from attacking alien forces, and you'll put your skills into play across more than 30 campaigns. There's a huge list of aircraft for you to tame ranging from helicopters and planes to high-tech hovercraft. With 100 vehicles in all, deadly enemies, and 3D graphics, ECHELON is one far out trip through the solar system.

Public builds
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Counted once we have watched for 90 days (since 21 Oct 2026)
Distinct builds deployed to a game's public (default) Steam branch, as Steam's client network describes them.
Checked within minutes of each Steam change. Observed since 21 Oct 2026.
Source: Steam client network (PICS), App info, public branch. Full methodology
Latest public build
Build 311801
Update posts
0 postsPosts announcing an update, tagged or not
Posts in a game's official Steam news feed that announce an update: tagged as patch notes by the developer, or plainly about a patch or a released update.
Source: Steam Web API, ISteamNews/GetNewsForApp. Full methodology
Typical gap between builds
Not enough builds yet| Build | Went live | Patch notes |
|---|---|---|
| 311801 | None posted |
From Steam’s client network, last checked . Builds before 21 Oct 2026, when we started watching, aren't listed. Patch notes are the developer’s update post from an hour before to a day after the build. Not every build gets one. How we count
No update posts from before 21 Oct 2026 found yet.
Steam keeps no record of past build numbers, so before 21 Oct 2026 a game’s update history comes from its own Steam news: posts tagged as patch notes, and untagged posts that plainly announce a patch or a released update. Older posts are still being read in, most played games first. How we count