Machines left behind on the Moon and Mars are still sending signals. Follow them, hear their stories, and find every one.
The Moon
Mars
Loading the film…
What should ECHO call you?
Type your name or a nickname. You can change it any time in Settings.
Saved only on this device.
SIGNAL FOUND
ECHO is scanning
ACHIEVEMENTS
Badges
CERTIFICATE
Your certificate
SETTINGS
Settings
Sound
View
Field of view changes how wide you see through the astronaut's eyes. Lower it if moving around makes you feel dizzy.
Game
Progress
Restart from the beginningErases your machines, badges and levels on this device.
Erase all progress? This can't be undone.
LEVEL SELECT
Choose your mission
Scan every machine and save its story to pass a level. Passing unlocks the next one.
LEVEL PUZZLE
LEVEL COMPLETE
Drag to rotate · Scroll to zoom
INSPECT EQUIPMENT
PARTS INSIDE
RECOVERED ARCHIVE
0 machines scanned
ABOUT
Echo: Abandoned but Not Forgotten
A free browser game about the machines humanity left on other worlds. Explore the Moon and Mars, track down the landers, rovers and rockets left behind, and hear each one tell its own story.
35machines to find
6levels on 2 worlds
1964–todayof exploration
Who it's for
Made for students in grades 6–12, and anyone curious about space. It runs in any modern browser on a computer, tablet or phone. Nothing to install and no account needed. Your progress is saved on your device, and once saved for offline play it works without internet.
How it plays
Follow ECHO's signal to each machine, let ECHO scan it and listen to its story. Answer its question to save the story to your Archive. Find every machine in a level to unlock the next one, then rebuild a real NASA photo to finish the level.
What's real
Every mission fact, date and landing site comes from NASA. The photos are real NASA mission images, and many machines use NASA's own 3D models. To keep the game playable, the ground is generated to look like each world, and the sites are placed much closer together than they really are. On the real Moon and Mars they're hundreds to thousands of kilometres apart.
Sources
Facts were checked against these sources in November 2026. Dates are in UTC.
Stories, dates and landing sites
NASA NSSDCA Master Catalog: launch date, arrival date and launch weight on the facts page of 34 machines
Each photo's credit is shown under it in the game.
3D models
NASA 3D Resources: the Apollo Lunar Module, Viking, Spirit and Opportunity, Curiosity, InSight, Ingenuity and Perseverance. The other machines are simplified models made for this game.