Mentium is an Android trivia game with 13 modes, 10 culturally-anchored languages (not just translations), and no mandatory paywall. The hook: your AI rival uses Gemini to remember every match — your weak categories, your panic patterns, the time you nailed that obscure question. After a few games, it plays you, not the questions. Modes range from classic 1v1 to a 50-question Exam marathon, conversational Detective interrogations, and async Online. Indie, EU-hosted, free-to-play.