Free Krillion is a free daily diving trivia game. Everyone gets the same 7 questions a day, 25 seconds each — and you are scored by how rare your answers are, not just whether they are right. Obvious answers score low, obscure answers score high, and your total becomes your depth: score x 10 metres, up to 7,000 metres. The game never reveals the answers, so no list can be memorised and repeated.