What is 20-0?
This 20-0 is a fast, free NFL roster-building game: spin for an era, draft one player per position across nine rounds — quarterback through defensive back — simulate a full regular season, and if your record is strong enough, a real three-round playoff bracket on top of it. It's built in the same spirit as the small genre of viral "draft an all-time roster and chase an undefeated season" games that started in basketball and has since spread to football and baseball — including other products that use the "20-0" name — but it's an original, independently built game, not a clone of any of them, and not affiliated with any of them.
How to play
Each of the nine rounds targets a specific position: quarterback, running back, two wide receiver slots, tight end, offensive line, defensive line, linebacker, and defensive back, in that order. Spin to reveal an era and a candidate pool, pick your player, and move to the next round. A limited number of rerolls are available if a spin leaves you with nothing that fits. Once all nine positions are filled, the regular season simulates automatically, followed by the playoffs if your record qualifies.
Why the name is 20-0, not 17-0
A perfect 17-game regular season always finishes as the league's #1 seed, and a #1 seed always earns a first-round bye — so a genuinely flawless run is always exactly three playoff wins away from complete: the Divisional round, the Conference Championship, and the Super Bowl. This build simulates all three, single-elimination, the same as the real format. Go 17-0 in the regular season, then win out in the playoffs, and the results screen shows the full run — not just the regular-season half of it.
Why the schedule length actually changes
Every version of this game we looked at simulates a fixed number of regular-season games regardless of which era you draft from. The real NFL didn't play a consistent schedule length across its history — 14 games through the 1970s, 16 from 1978 to 2020, 17 since 2021 — so this simulates the actual schedule length for whichever era your roster ends up representing, with the same three-game playoff structure layered on top regardless of era. A flawless 1970s run and a flawless 2020s run represent a genuinely different amount of regular-season work, but the same playoff gauntlet.
Why every pick has to fill a real position — offense and defense
Most games in this genre score a roster by totaling raw production with no real check on roster balance. This build locks each of its nine rounds to a specific position, on both sides of the ball — a roster with no real pass rush or no coverage help behind it gets caught by the chemistry system, not just discovered the hard way when the season simulates.
Classic vs. Blind Draft
Classic mode shows full ratings while you draft, so you can make informed, strategic picks. Blind Draft hides every number — you're drafting on position, archetype, and what you actually remember, then finding out how good your instincts were when the season simulates.
What the chemistry breakdown actually shows
Every completed roster gets a named list of what's working and what isn't — bonuses like Elite Passing Attack, Dominant Trenches, or Relentless Pass Rush, and penalties like Leaky Protection, One-Dimensional Offense, or Exposed Secondary — each with the specific reason it triggered. If your run falls short of flawless, you can see exactly why.
Frequently asked questions
Is this 20-0 affiliated with the NFL or any other roster-building game?
No. This is an independent, original game. It is not affiliated with, endorsed by, or licensed by the NFL, and it is not a clone of or affiliated with any other "perfect season" roster-building game — including any other product that shares the "20-0" name.
Is 20-0 free to play?
Yes, entirely free, with no account required. Progress and personal bests are saved to your browser only.
How many players do you draft?
Nine, one per round: quarterback, running back, two wide receivers, tight end, offensive line, defensive line, linebacker, and defensive back — a real position on both sides of the ball, not just five offensive skill picks.
Why is it called 20-0 instead of 17-0?
Because the simulation doesn't stop at the regular season. A roster that finishes undefeated always earns the #1 seed and a first-round bye, which means exactly three playoff games stand between a perfect 17-game regular season and a complete run: the Divisional round, the Conference Championship, and the Super Bowl. Win those three on top of a flawless regular season and 17-0 becomes 20-0.
Does the season length change by era?
Yes. The NFL regular season was 14 games through the 1970s, 16 games from 1978 through 2020, and 17 games from 2021 onward — this simulates the actual schedule length for whichever era your roster ends up representing, not a fixed number regardless of era. The three-game playoff run is simulated on top of that regardless of era, matching the real three-playoff-win shape a #1 seed has faced under every version of the modern playoff format.
What is the difference between Classic and Blind Draft mode?
Classic shows full player ratings while you draft. Blind Draft hides every number — you draft on position, archetype, and what you actually remember, then see how your instincts held up once the season simulates.
Why does my roster show bonuses and penalties?
Every completed roster gets a named, specific breakdown of what is and is not working — Dominant Trenches, Leaky Protection, Exposed Secondary, and more — each with the exact reason it triggered.
Is there a daily 20-0 challenge, and can I compete against a friend?
Yes. The Daily Challenge gives everyone the same seeded draft pool for the UTC day and a same-day leaderboard ranked by record and grade — share your seed with a friend and compare results there, since there isn't a live head-to-head mode. It resets at midnight UTC with no archive of past days. Free play outside the daily is unlimited, with no per-day cap.
What's the best strategy, and how are the ratings and grade calculated?
Team overall blends offense, defense, and pass/run game as the biggest weights, plus trenches and chemistry, then adjusts for how well your players' eras match the era you're simulating in — so don't ignore the line and secondary rounds, and stay close to the spun era when you have a choice. The grade is simpler: any loss caps you below S, and win percentage sets A through F from there.
Can I play 20-0 on mobile, and how do I share my result?
Yes — it's a free browser game with no app to install, and it works in any modern mobile browser; progress saves to that browser's local storage. After a run, the share button opens your phone's native share sheet, or copies your record, grade, and seed to the clipboard on desktop — there's no image export yet, just shareable text and a link.
How many eras and players are in the pool, and what counts as the best possible result?
Seven NFL decades, 1960s through 2020s, draw from a 77-player pool across all nine positions, with three candidates shown per round. There is no numeric high score — the ceiling is a perfect run: an era-accurate regular season with zero losses plus all three playoff games won, which earns the S grade and a "ran the table" result.
How many rerolls do I get, and does my progress save?
Three, total, for the whole nine-round draft — not three per round — so spend them on a position the spin genuinely doesn't fit. Your in-progress draft, personal-best record, last 50 completed runs, and flawless-run count all save automatically to that browser's local storage; there's no cross-day streak counter, only the longest win streak within a single season's result.
Is there a salary-cap mode, and how is 20-0 different from 82-0, 17-0, or 162-0?
Yes. An optional Salary-Cap mode toggle sits on the welcome screen before you start drafting — flip it on and every player costs a salary based on their overall rating, and you have to build all nine roster spots under a fixed cap instead of just taking the best card at every slot. Leave it off and you get the Classic draft, where every pick costs the same and era and candidates are decided purely by the spin. <a href="/games/17-0/">17-0</a> is the same nine-round engine (with the same Salary-Cap option) with the playoffs removed, so a flawless regular season is the whole game. 82-0 and 162-0 are separate basketball and baseball games built on their own engines. 20-0 is the only one that adds a real three-round NFL playoff bracket on top of the regular season.
Has any real NFL team actually gone 20-0?
No — no team has ever finished a season totaling 20 wins under any format. The closest is the <a href="/1972-dolphins-perfect-season/">1972 Miami Dolphins</a>, who went 17-0 under that era's 14-game regular season plus three playoff wins, the same "regular season plus three playoff rounds" shape this game simulates. See every team that has finished undefeated in <a href="/every-undefeated-nfl-team/">our guide to every undefeated NFL team</a>.
Unofficial-project disclaimer
20-0 is an independent, unofficial football simulation game. It is not affiliated with, endorsed by, or licensed by the NFL or any professional football team, and it is not affiliated with any other roster-building game. Historical names and statistics, where used, are presented for informational and entertainment purposes.
