Echo Chamber was made for 7 Day Roguelike Challenge 2026.

the version playable on itch.io has extra bugfixes.
echo-chamber-7drl.html is the submission for 7drl

Your submarine must find and secure confiscated document capsule hidden at the end of the undersea cavern. Without sonar sight will be limited. However, when you use the sonar to find enemy, the enemy will learn your presence as well...

movement: LMB / wasd / arrow keys
launch torpedo forwards: z
launch torpedo upwards: c
drop depth charge: x
turn on/off sonar: q

By scarf

Made with AI using gpt-5.4 on opencode from 2026-03-07 to 2026-03-08

Font is 3270font by rbanffy

Music by Kevin MacLeod

"SCP-x2x (Unseen Presence)" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
http://creativecommons.org/licenses/by/4.0/
Credit for Other SFX are in-game

More information

Status	Released
Platforms	HTML5
Author	scarf
Genre	Role Playing
Tags	Horror, Roguelike, Stealth
Code license	GNU General Public License v3.0 (GPL)
Asset license	Creative Commons Attribution v4.0 International
Average session	A few minutes
Languages	English, Korean
Inputs	Keyboard, Mouse
Links	GitHub
AI Disclosure	AI Assisted, Code, Text

Download

echo-chamber-7drl.html 10 MB

Install instructions

the .html file is self contained. to play, double click it and open on any browser (e.g chrome)

Comments

DFuxaPlays36 days ago (1 edit) (+1)

Kinda wish the enemies were not so difficult.