Achievement badge

Keep this apart from a badge, which is the small count or status marker that sits on an icon or a row. The distinction is tense: a badge describes a state right now (three unread, beta, offline) and disappears when that state does. An achievement badge records something that happened once, is dated, and cannot be un-earned. That is why the two are drawn differently, one a live number attached to a thing and the other a keepsake with a name, and why merging them in a design system produces a component that neither reads as a count nor as an award.

The pattern’s power comes from the set rather than the award. Showing the locked ones, greyed out and named, turns a scattered list of things you did into a collection with holes in it, and the holes are the motivation: the display is the goal, which is why the greyed-out state is worth as much design attention as the earned one. It works on the same machinery as an endowed progress bar and a streak, and it runs the same risk. Rewards that people can see coming shift attention from the activity to the reward, so an achievement pinned to something the reader would do anyway is fine, and one pinned to something they otherwise would not is a nudge you should be able to defend out loud.

Make them mean something. A badge for signing up is a participation trophy and devalues the row it sits in; one for a genuinely difficult or rare thing carries information about the person, which is what makes it worth displaying. Name them so the name is legible without the tooltip (“Five weeks running”, not “Iron Chef III”), date them, and say what earned them, since an award nobody can explain reads as decoration. Hidden or surprise achievements are the exception that proves the rule: they work precisely because the collection they belong to is otherwise fully visible.

Three failure modes recur. Retiring a badge from the catalogue while it stays on old profiles creates an award that can never be earned again, which is either a nice piece of history or an unfair advantage, and you have to choose deliberately. Awarding them retroactively floods the reader with a screenful of unlocks that mean nothing, so backfill quietly and celebrate only what happens next. And an achievement grid on a leaderboard becomes a scoreboard by another name, which is worth wanting or worth avoiding, but not worth stumbling into.