Beat the NES.
Prove it.
FlawlessNES turns retro NES games into bite-sized challenges with verified completions and live leaderboards. Run them in BizHawk; your scores ping the board the moment you win.
Same Google account works across the desktop app and web — your stats follow you.
What’s New in v1.6.0
This update is about getting you playing faster — with whatever copy of a game you already own.
Play with your own ROM
The launcher now accepts any standard dump BizHawk recognizes — region and revision variants included — not just one exact file. Legit ROMs that used to get rejected now just work.
One-click “this is my game”
Got an unusual dump we don’t recognize yet? Mark it as the right game in a single click from the in-app ROM Scanner — no more “ROM not found” dead-ends, and your runs still count.
New game: Karnov
Data East’s fire-breathing arcade classic joins the lineup. Challenges are coming soon.
Curated NES challenges
Boss fights, speedruns, score targets, survival gauntlets — each one a tight scenario you can pick up and run in a couple of minutes.
Verified completions
Win conditions read directly from emulator RAM. No screenshot uploads, no honor system. The challenge fires complete the instant you actually win.
Time-first leaderboards
Every challenge ranks by completion time. Score breaks ties. The fastest legitimate run wins — no exceptions.
Featured creator
Slackanater
Retro NES streamer focused on damageless playthroughs and clean speedruns. Pulled off the world’s first 100% damageless run of Ninja Gaiden NES — the kind of patience-and-pattern-recognition mastery FlawlessNES is built around. Catch live runs on Twitch and breakdowns on YouTube.
Watch the creators live
The folks building and breaking these challenges on stream — drop in for a watch.