Free daily rare-answer trivia: five open prompts, 30 seconds each, server-scored. The rarest correct answer wins. Challenge a friend with the same set. No signup. Unaffiliated with Krillion.
Open the site and answer five daily open prompts before the 30-second server clock ends. Scores come from a reviewed answer bank (20–100 points); the rarest correct answer scores highest. Finish, then send the challenge link so a friend plays the same five. Unlimited practice mode is available. No signup.
Outlier Duel was submitted to SlowDen by Outlier Duel Team. SlowDen did not make this game - it is published here from the developer's own submission, added on 2026-11-02. It runs in the browser with no download, no install and no sign-up.