Regex Game

Regular Expressions (Regex) are a powerful text pattern-matching tool used for searching, replacing, and validating strings. The game wraps Regex into text-based puzzle, allowing players to gradually master regular expressions as they progress through levels.

Strategy

Developer

ZeroBitCode

Released

16 Jul 2025

1 year ago

Core Gameplay

Regular Expressions - an essential skill for programmers - become your puzzle-solving tool.

Starting with basic number matching, each level introduces new Regex rules with gradually increasing complexity.

30+ Meticulously Designed Levels covering fundamental Regex concepts through:

Accessible Design: 95% of the levels require no coding experience to pass perfectly. Players who can program can use their abilities to reduce the difficulty of the red level.

Brain Teasers: Regex-themed mini-games between chapters to consolidate skills. The subtle pace of the challenge helps to alleviate the frustration of a failed challenge.

Wooden Fish: Tapping the wooden fish increases the accuracy rate

Regular Spelling of Words: Move characters to spell words

Regular Ninja: Eliminate words that match a given regular expression

Password Hint: Write a password that meets all the requirements for regular expressions
Regex VS String

First Challenge Example

Real-world Scenario: Identify email addresses in text:

Regex Tips:

\d matches digits

+ indicates "one or more" of preceding element

~ o(*￣▽￣*)o That's right! Solution:

"Congratulations! You've cleared the toughest level in Chapter 2!"

(Quick Flip Book)

Web Crawling Simulation

Chapter 4 Challenge: Extract HTML links from tags:

So smart! Advanced Solution:

<a[^>]*?href\s*=\s*[\"\']?(?<URL>[^\"\']+)[\"\']?[^>]*?>

( ˘•ω•˘ ) What? Not yet?

Keep playing! The early levels will systematically build your skills to conquer advanced challenges.

(Players who can solve this problem should have studied regular expressions. The first 3 chapters are mainly for beginners, so please skip the level on your own according to your ability.)