Life & fun · alternatives · 2026
24 alternatives to 99Floors
World's Hardest Game Challenge
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. 99Floors launched in 2018; newer entries below may have overtaken it.
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- 12R1
I recently remembered a game we used to play with pen and paper some 20 years ago, where you need to fill a 10x10 grid writing numbers in the grid up to 100 following 2 simple rules. After showing it to my kids I thought it would be nice to adapt it digitally so that they could play it more often (not needing to draw the grid etc.) and so that other people could play it as well. What I'm really interested in with this submission (beyond general feedback) is wether anybody knows the origin of the game and if it's solvable. Because that's the catch, my highest score of all time is 97 and it…
2022 · reach-100.com · its alternatives →
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Evil Sudoku▲12Challenge your logic with the hardest sudoku puzzles online
2025 · sudoku-evil.com · its alternatives →
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Free Sudoku with the hardest puzzles and easiest use!
2021 · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →