Bullpen: Logic Puzzle Game
Welcome to Bullpen – a clean, logic-based puzzle game where every bull must be placed just right. It's like Sudoku meets Minesweeper. Simple Rules, Deep Strategy – Place one bull per pen, row, and…

by Rottz Games
Einstein's Riddle Logic Puzzle by Rottz Games is a free brain game in the Puzzle Games category, available for Android. It mainly trains Logic & Reasoning. Features: Daily challenges. It holds a 4.8/5 average from 175.1K store ratings.
Master Einstein's Riddles: Pure deduction game. No guesses. 🧠
Played and loved by millions since 2013.
5,000+ FREE puzzles. Compete live. Crush leaderboards.
Clues like: "German owns a dog. The one who drinks coffee does not have a fox"
✅ Endless Free Content: 5K+ single player logic puzzles – zero paywalls
✅ Daily Fresh: 15 new Zebra Puzzles every day
✅ Live Competition 🔥: Compete real-time worldwide – same puzzle, fastest wins. Rank in leaderboards.
✅ 49 Achievements: from your first solve to 5,000 puzzles, daily-challenge streaks and hours at the grid
✅ Scale Up: Easy 4x4 to massive grids
✅ Tutorial + Tools: Guided first solve + a clue filter that hides what you have already ruled out
✅ Color Themes: Light, Dark and a range of colors – pick the one that suits the room you are
Welcome to Bullpen – a clean, logic-based puzzle game where every bull must be placed just right. It's like Sudoku meets Minesweeper. Simple Rules, Deep Strategy – Place one bull per pen, row, and…
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