Formation Day
Formation Day is an auto battler puzzle that plays in the browser on phones, tablets and computers, for one player. It has a daily challenge, the same for everyone that day.
Set the marching order of your five toy units against a fixed rival line and watch the bout play out. Each unit has power, health and one ability, and a solver checks all 120 orders so that exactly one of them wins. Today's line is the same for everyone, and Practice offers numbered lines.
How to play
- Tap one of your units, then another slot to swap them
- Fronts clash each round; when one falls, the next steps up
- Some abilities work from behind the front: read each tile
- Press Fight to watch the bout
- Five tries a line: fewer tries score more
The game shows these steps as you play, the first time.
Controls
- Tap a unit, then another slot to swap
- Or drag
- 1 to 5 pick and swap slots
- Arrows and Enter
- F fight
- Space speeds up the bout
Tips
- Units behind the front still matter: Archers hit the rival front for 1 each round and Herbalists heal the unit just ahead.
- Put a Shield or a Hedgehog where the rival's hardest hitter will meet it, since a Shield blocks a whole hit and a Hedgehog returns 1.
- You have five tries, and after your second loss one slot of the answer locks in place each time, front first, so watch each bout closely.
Is there always a way to win?
Yes. Before a line is shown, a solver plays all 120 orders of your five units and keeps the line only if exactly one order wins. That order also sets the par: winning with it on the first try scores 100 plus the health your line has left.
How is a line scored?
A win on the first try scores 100, and each extra try costs 20, so a win on the fifth try scores 20. The health your units have left is added on top. Today's line counts towards a day streak, and Practice keeps your best line score.
About this game
Made by Sucia in Houston, Texas. Built with AI assistance, designed and tested by Sucia. Last updated October 9, 2026. It plays in the browser on phones, tablets and computers, with no download and no sign-in; your best scores and progress stay in this browser on this device. Without a pass, every game is free for 5 minutes a game and 30 minutes a day; an Arcade pass removes the limit. How Sucia makes and tests its games.
Also by Sucia
Sucia Studio, a video editor for streamers, runs on Windows and Linux: record, cut long VODs by transcript and make Shorts. YouEdit, a video editing service for stream recordings, turns a recording into a YouTube video, Shorts, titles and the upload text, quoted in credits before it is made. Streaming on Twitch, Kick or YouTube? Sucia Live makes highlight videos and Shorts from your VOD.
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