Tumblers is a daily four-digit lock to crack. You get four tries, and every guess tells you which digits are right, which are in the wrong place and which aren't in the code, so a careful player can always work it out. There's also a Hard mode with cryptic clues and a 60-second Challenge mode. It's free, needs no sign-up, works offline once installed, and there's a new puzzle every day. Made by one Australian solo dev.
Tumblers - Daily lock was submitted to SlowDen by MadMooseGAmes. SlowDen did not make this game - it is published here from the developer's own submission, added on 2026-10-23. It runs in the browser with no download, no install and no sign-up.