The original Simon electronic memory game has been testing people's short-term memory since the 1970s: watch a sequence of colored lights flash, repeat it back, and try to keep up as the pattern grows one step longer each round. It's a deceptively simple idea that's stayed popular for decades because there's no faking your way through it — either you remember the sequence or you don't.
Simon Duel is RivalPit's free browser version of that same memory challenge. It's not Simon and isn't affiliated with Hasbro, but the core test — watch, remember, repeat, and watch the pattern grow — is exactly the same game people have been playing for generations.
What Simon Duel plays like
- Watch the pattern. Colors light up in sequence — pay attention, because it only shows once per round.
- Repeat it back. Click or tap the colors in the exact order they appeared.
- The sequence grows. Every round adds one more step, pushing your memory further each time.
- Head-to-head mode. Duel a friend to see who can hold the longest sequence in their head before slipping up.
No download, no batteries, no waiting
Simon Duel runs entirely in your browser at rivalpit.com — no physical device, no batteries to replace, just open it on desktop or phone and start testing your memory. Try it free as a guest, or sign up to save your best streak.
Simple to learn, genuinely hard to master
There's no strategy to hide behind here — it's pure memory under pressure, which is exactly why the format has stuck around for as long as it has.