Space Invaders

🔄Rotate your phone for the best experience

About Space Invaders

Space Invaders is the arcade shooter that essentially defined the entire video game industry when it launched in Japan in 1978. This browser version brings the pure gameplay loop back to your screen: rows of alien invaders march side to side and slowly descend, you pilot a laser cannon at the bottom of the screen, and you must shoot every alien before they reach you. Four green barriers stand between you and the invaders, and they absorb hits from both your bullets and the aliens', slowly crumbling as the wave progresses.

The genius of Space Invaders is how tension builds during a wave. At the start, there are many aliens and they move slowly — you have time to aim, plan and dodge. As you shoot them, the remaining aliens speed up (in the original arcade this was a bug caused by the CPU having fewer sprites to render, but it turned out to be brilliant game design). By the last few aliens, they are darting side to side at terrifying speed and firing constantly. Then the wave clears, the next one begins closer and faster, and the cycle repeats.

This version keeps everything essential: alien formations, marching movement, edge-triggered descent, breakable barriers, alien return fire and a three-lives structure. Each wave is harder than the last — more aliens, faster movement and more aggressive fire — and your score climbs based on which alien row you shoot (higher rows are worth more). Your best score persists locally so every session gives you a target to beat. Reaching wave five is a solid milestone, wave ten is impressive, and clearing wave fifteen is the mark of a serious player.

Space Invaders remains one of the purest arcade experiences ever designed. There is no upgrade shop, no meta-progression, no story — just movement, aim, timing and nerve. It runs free in your browser on any device, with keyboard controls on desktop (arrows to move, space to shoot) and touch controls on mobile (drag to move, tap to hold-fire). The only thing standing between you and a new personal best is your reaction time.

— How to play

How to play Space Invaders

← / → or A / D to move
Space to shoot
Mobile: drag to move, tap to hold-fire
Clear every wave — do not let aliens reach you

— Controls

Space Invaders controls

Desktop (mouse & keyboard)

Use arrow keys, WASD, the mouse or spacebar where the game requires it. Specific controls match the "How to play" steps above — each step describes the exact input the game expects.

Mobile (touchscreen)

Tap, hold, swipe or drag — whichever your finger naturally does for the action described in the steps. Space Invaders is mobile-first and works in portrait or landscape on any modern phone or tablet.

— Strategy & tips

How to win

Kill the outermost columns first — it gives you more room to dodge.
Do not stand still. Even when nothing is coming, drift so the aliens have to lead their shots.
Use the barriers deliberately — hide under a shield when a bullet is coming.
The last alien in a wave is fastest. Track it early, do not save it for last.
Higher rows score more — snipe the back rows through gaps for extra points.
Do not waste shots. You are limited to three bullets on screen at once.
Barriers block your shots too — do not stand directly under a full shield.
When the wave count climbs, aliens fire more often; move constantly, not reactively.

— Game features

Why you'll love it

Authentic 1978 arcade formation and movement
Breakable green barriers that absorb both your fire and theirs
Enemy fire rate scales with wave number
Three lives per run · higher rows score more
Best score saved locally between sessions

— Origin & history

The story behind Space Invaders

Space Invaders was designed by Tomohiro Nishikado and released by Taito in July 1978. Nishikado spent a year designing custom arcade hardware just to run the game, because no off-the-shelf 1970s chip could animate that many sprites at once. When it launched in Japan, it was such a phenomenon that it reportedly caused a nationwide shortage of 100-yen coins. The game reached the United States in 1979 through Midway (Atari's arcade rival), where it became the highest-grossing entertainment product in America — outperforming both music and film that year. Space Invaders is credited with essentially creating the arcade industry as it existed for the next decade, inspiring Pac-Man, Galaxian, Defender and every other landmark shooter of the golden age. It also introduced the concept of a persistent high score, which is why "high score" chasing became a defining feature of gaming culture. Nishikado has said his primary influence was H.G. Wells' War of the Worlds — the aliens were originally supposed to be humans, but he changed them because shooting people felt uncomfortable.

— Advanced strategy

Master-level Space Invaders

The core strategic decision in Space Invaders is column priority — which vertical column of aliens you shoot down first. Beginners shoot whatever is directly above them, which produces steady scoring but leaves the alien formation wide, meaning it takes longer for the descending group to be dangerous but also meaning you cannot easily dart between shots. Experts kill the outermost columns first (left edge or right edge), which shrinks the formation horizontally and creates safe corridors on the sides of the screen where you can stand while raining fire into the compressed centre. This "narrowing the pack" technique turns Space Invaders from a chaotic dodging drill into a controlled shooting gallery, and it is the single change that most extends wave counts.

The second key skill is shield economy. Each of the four green shields can absorb dozens of shots before crumbling, but they crumble asymmetrically — the top absorbs hits from your fire (going up) and the bottom absorbs hits from alien fire (coming down). Standing directly under a shield forever seems safe but it wastes the shield rapidly. The correct pattern is to duck under a shield only when a specific enemy bullet is on the way, and to move out as soon as it hits. The shields become permanent cover in the middle-late game once the aliens are firing intensively, and preserving them for those moments is far more valuable than using them as static hiding spots in the early waves.

— Frequently asked questions

Space Invaders FAQ

Why do the aliens speed up as I shoot them?

In the original 1978 arcade, the CPU could only redraw sprites at a fixed rate, so with fewer aliens on screen the whole formation moved faster because the redraw loop completed sooner. It was technically a hardware limitation, but it turned out to be perfect game design — the tension increases precisely when you would otherwise get bored. Modern remakes deliberately preserve this behaviour because removing it makes the game feel flat. This version scales alien speed with kills to keep the classic pressure curve intact.

Can I clear the game entirely?

The original arcade Space Invaders had a loop counter bug at wave 255 that caused a crash-like behaviour known as the "kill screen", but for practical purposes the game is endless. This version follows the same design — waves keep coming, they keep getting harder, and the game ends when you lose all three lives or when aliens reach the bottom. The real "clear" is beating your own best score, not clearing all content.

How do the shields work?

Each shield is made up of small square cells. Any bullet — yours or the aliens' — destroys the specific cell it hits. Over time, shields develop irregular holes and eventually crumble entirely. This means shield preservation is a genuine skill: firing through your own shield to hit an alien wastes shield durability, so experienced players position themselves next to or between shields rather than under them.

— Similar games