PlayStore Radar

Zerko icon
Zerko
Rainbow Train
4.6 (74 ratings)
5,000+ downloads
Est. actual: 5,630
Style: Number
2.62 USD
Released: Mar 26, 2024
Installs since launch
0 2.8K 5.6K Sep 15: 5,626 installsSep 16: 5,626 installsSep 17: 5,630 installs 5.6K Mar 26, 2024 today
+4 installs · 0 ratings since Sep 15
Update history
1.1 Oct 4, 2025 · seen Sep 15, 2026
- Bug fix
Only the current version so far — new entries appear as the game ships updates.
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Some call it reverse sudoku, while others call it a nullification game, but it's Zerko - a puzzle game filled with shapes, numbers, and a straightforward goal: make every number zero. To achieve this, you need to strategically place blocks of various shapes and values so that the numbers on the board effectively "remove up" to zero. Like all my games, this one too is about relaxation... Just chill. There are no points, no time pressure, no data collection, no in-app purchases, no ads, no nonsense ;) My only hope is that you'll enjoy it and that I'll be able to add new content and levels for you in the future. Relaxing audio by: Marek Koszczyński