Super Mario Bros

Super Mario Bros is Nintendo’s landmark 1985 side-scrolling platformer, where you run and jump through the Mushroom Kingdom as Mario to rescue Princess Peach from Bowser. You can play it officially through Nintendo Switch Online or the NES Classic, and many free, unofficial browser ports let you play it instantly with no download. Standard browser controls use the arrow keys or WASD to move, with the jump held longer for higher jumps and Shift or CTRL to run and throw fireballs. It runs on desktop and most mobile browsers.

Key Takeaways

• “Super Mario Bros is Nintendo’s classic 1985 NES side-scrolling platformer.”
• “The goal: run and jump through 8 worlds to rescue Princess Peach from Bowser.”
• “Browser controls: arrow keys or WASD to move, hold to jump higher, Shift/CTRL to run.”
• “Official versions are on Nintendo Switch Online and the NES Classic; browser ports are unofficial.”
• “Power-ups like the Super Mushroom and Fire Flower change how Mario plays.”

What Is Super Mario Bros?

Super Mario Bros is a side-scrolling platformer released by Nintendo in 1985 for the Nintendo Entertainment System (NES), in which players guide Mario (or Luigi) through the Mushroom Kingdom to rescue Princess Peach from the villain Bowser. It helped define the platformer genre and launched gaming’s most famous franchise, marking its 40th anniversary in September 2025.

The game first appeared in Japan on the Famicom on September 13, 1985, before reaching the NES worldwide. Its design — tight jumping, hidden secrets, and steadily escalating challenge — became the template that countless platformers followed. You play across eight worlds, each ending in a castle guarded by Bowser (or a decoy). Two players can alternate turns as Mario and Luigi. Its influence is hard to overstate, but by modern standards it’s short and punishing: there’s no mid-level saving in the original, so a single mistake can cost real progress.

Key Insight: “Super Mario Bros is widely credited with reviving the home console market after the 1983 industry crash, and its precise jump physics still set the standard platformers are measured against.”

Key features at a glance

• Eight worlds of side-scrolling levels ending in castle stages
• Two-player alternating play as Mario and Luigi
• Power-ups that change Mario’s size and abilities
• Hidden coins, secret areas, and warp zones to discover

How to Play Super Mario Bros

To play Super Mario Bros, move right through each level by running and jumping, stomping enemies like Goombas and Koopa Troopas, collecting coins, and reaching the flagpole at the end. Grab power-ups to grow stronger, avoid pits and hazards, and clear each castle — defeating Bowser — to advance toward rescuing Princess Peach.

The structure is simple but demanding. Each of the eight worlds has four stages, and the final stage is a castle. You have a set number of lives; falling in a pit, touching most enemies while small, or running out of time costs one. Collecting 100 coins grants an extra life, and stomping enemies in quick succession builds bonus points. Power-ups are central: the Super Mushroom makes Mario bigger (letting him take one hit), the Fire Flower lets him throw fireballs, and the Starman grants brief invincibility. Pipes sometimes hide bonus rooms or shortcuts. The pacing rewards players who learn enemy patterns rather than rushing — a discipline shared by precision platformers like Geometry Dash.

Pro Tip: “Hold the run button before a wide gap. Mario’s jump distance scales with his running speed, so a full sprint clears pits that a standing jump can’t reach.”

The goal and level structure

Your objective is to reach the flagpole at the end of each stage and ultimately beat Bowser in World 8 to save the princess. Jumping higher on the flagpole earns more points.

Power-ups (Super Mushroom, Fire Flower, Star)

The Super Mushroom grows Mario, the Fire Flower adds fireball attacks, and the Starman gives temporary invincibility. Hitting question blocks and hidden blocks reveals them.

Super Mario Bros Controls

In most browser versions of Super Mario Bros, you move with the arrow keys or WASD, jump by pressing up or a dedicated jump key (holding it longer for a higher jump), and run or throw fireballs with Shift or CTRL. Press down to crouch or enter pipes. The original NES used the D-pad with the A and B buttons.

Because browser ports vary, the exact keys can differ between sites, so check the on-screen instructions when a game loads. On the original hardware, B was run/fire and A was jump — most emulated versions map these to Shift/CTRL and the spacebar or up arrow. Mobile ports usually add on-screen touch buttons, though precise jumps can feel harder on a touchscreen than with a keyboard. If keys don’t respond at first, click directly on the game window once to give it focus, then try again.

Pro Tip: “Keep the run button held almost constantly. In the original game, running not only moves you faster but is required to make several of the longest jumps in later worlds.”

Where to Play Super Mario Bros Online (Official vs Free Browser)

The official Super Mario Bros is available legally through Nintendo Switch Online’s NES library and on the NES Classic console, both of which require Nintendo hardware or a subscription. Many free browser versions also exist as unofficial emulated or fan-made ports playable with no download, though these are not authorized or endorsed by Nintendo.

This distinction matters. Nintendo owns the Super Mario Bros trademark and copyright, and it has historically acted against unauthorized distribution of its ROMs. The official routes — Switch Online, the NES Classic, and various Nintendo remasters and collections — guarantee the genuine game, ongoing support, and no legal grey area. Free browser sites, by contrast, are convenient and require no purchase, but they run unlicensed copies and are often ad-supported, with ad quality and safety varying widely by site. As a browser experience, performance depends on the emulator and your device; older or low-memory hardware may stutter.

Safety Note: “Unofficial browser ports of Super Mario Bros are not licensed by Nintendo and are commonly ad-supported. Use reputable sites, and note that ad behavior and availability can change at any time.”

Official Nintendo options

Nintendo Switch Online includes Super Mario Bros in its NES app, and the NES Classic ships with it built in. These are the only ways to play the genuine, licensed game.

Free browser versions

Numerous sites host emulated or HTML5 remakes you can play instantly. They’re free and need no download, but they’re unofficial — quality, accuracy, and ads vary from site to site.

Tips for Beginners in Super Mario Bros

Beginners progress fastest by stomping enemies from above instead of touching them, keeping a Fire Flower whenever possible for ranged attacks, and learning each level’s rhythm before rushing. Use warp pipes and the game’s hidden warp zones to skip ahead, and remember that holding the run button extends your jump distance across wide pits.

A few habits help most. First, never run blindly into the unseen right edge of the screen — many deaths come from sprinting into an enemy or a gap you couldn’t see. Second, protect your power-up state: staying big or keeping fire power means one mistake doesn’t send you back to tiny Mario. Third, the hidden warp zones (notably in World 1-2) can skip entire worlds, which is invaluable if later stages give you trouble. And don’t ignore the timer — lingering too long costs a life. The run-and-jump rhythm clicks with practice, so a few attempts at early levels pays off. For another precise-timing challenge, try Only Up Parkour or the side-scrolling action of Hollow Knight.

Pro Tip: “The World 1-2 warp zone can jump you straight to World 4. Take the high path near the level’s end, run across the ceiling, and skip the pipe back down.”

Games Like Super Mario Bros

If you enjoy Super Mario Bros, other side-scrolling and physics platformers deliver the same run-jump-explore satisfaction. Look for browser games built around precise jumping, level progression, and collectibles, many playable free with no download in a similar retro-inspired style.

Good picks on plrun include Geometry Dash for rhythmic precision jumping, Hollow Knight for deep side-scrolling exploration, Mega Parkour Obby for platform challenges, and Star Fox or Retro Blaster for more classic arcade action. The broader adventure category lists more in the same spirit.

Frequently Asked Questions

What is Super Mario Bros?

Super Mario Bros is a side-scrolling platformer that Nintendo released in 1985 for the NES, in which you control Mario (or Luigi in two-player) through the Mushroom Kingdom to rescue Princess Peach from Bowser. It spans eight worlds of run-and-jump levels filled with enemies, coins, power-ups, and secrets. Widely regarded as one of the most influential video games ever made, it launched the Mario franchise and helped revive the home console market. It celebrated its 40th anniversary in September 2025 and remains a benchmark for platformer design today.

How do you play Super Mario Bros?

You play Super Mario Bros by moving right through each level, running and jumping to cross gaps, stomp enemies, and reach the flagpole at the end. Collect coins (100 earns an extra life), grab power-ups like the Super Mushroom and Fire Flower, and avoid pits and hazards. Each of the eight worlds ends in a castle, and you must defeat Bowser in World 8 to win. You have limited lives and a stage timer, so losing all your lives ends the run. Learning enemy patterns and jump timing is the key to steady progress.

What are the controls for Super Mario Bros online?

In most browser versions, you move with the arrow keys or WASD, jump with up or a jump key (hold longer to jump higher), and run or throw fireballs with Shift or CTRL. Press down to crouch or enter pipes. Exact keys vary between sites, so check the on-screen instructions when the game loads. On the original NES, the D-pad handled movement, B was run/fire, and A was jump. Mobile ports add touch buttons, though precise jumps are generally easier with a physical keyboard. If keys don’t respond, click the game window once to focus it.

Can I play Super Mario Bros free online?

Yes, many websites host free, unofficial browser versions of Super Mario Bros that you can play instantly with no download or account. These are emulated copies or fan-made HTML5 remakes rather than the official Nintendo release. They’re convenient and cost nothing, but they’re not licensed by Nintendo and are often ad-supported, with safety and ad quality varying by site. If you want the genuine, supported game, the official options are Nintendo Switch Online and the NES Classic. Always use reputable sites, since availability and ad behavior on unofficial pages can change without notice.

Where can I play the original Super Mario Bros officially?

The original Super Mario Bros is available officially through Nintendo Switch Online, which includes it in the NES game library for subscribers, and on the NES Classic Edition console, where it comes pre-installed. Nintendo has also included the game in various collections and re-releases over the years. These official routes require Nintendo hardware or a subscription, but they give you the genuine, licensed game with proper support and no legal concerns. They’re the recommended choice if you want the authentic experience rather than an unofficial browser port of uncertain accuracy.

Is playing Super Mario Bros in a browser legal?

Playing the official game through Nintendo Switch Online or the NES Classic is fully legal. Free browser versions occupy a grey area: they’re typically unauthorized emulated or fan-made copies, and Nintendo owns the Super Mario Bros trademark and copyright. Nintendo has historically acted against unlicensed distribution of its games. While playing such a port in your browser is common, it isn’t officially sanctioned, and the hosting sites — not necessarily the player — bear the main legal exposure. If you want to stay entirely within official channels, use Nintendo’s own services rather than third-party browser ports.

What are the power-ups in Super Mario Bros?

The original Super Mario Bros features a few key power-ups. The Super Mushroom makes Mario grow larger, letting him take one extra hit before shrinking. The Fire Flower turns him into Fire Mario, who can throw fireballs to defeat enemies from a distance. The Starman (Super Star) grants brief invincibility, letting you run through enemies safely. There’s also the 1-Up Mushroom, which awards an extra life. You find these by hitting question-mark blocks and hidden blocks scattered through each level. Keeping a power-up active is important, since taking a hit knocks you down a stage rather than killing you instantly.