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ZX Tennis brings compact Game Boy-style tennis to the ZX Spectrum with four difficulty levels, technical shots, and a wonderfully strange Mario cameo.
A handheld classic steps onto the ZX Spectrum
Some retro games arrive with grand ambitions. Others simply want to give you a racket, a tiny court, and an opponent who looks far too confident. ZX Tennis belongs firmly in the second group, and that’s part of its charm.
Developed by Oldschool Is Beautiful, a creator previously associated mainly with projects for the Amstrad CPC and ColecoVision, this new tennis game shifts the action onto the ZX Spectrum. Its design is based on the Game Boy version of Tennis, bringing that pocket-sized sporting formula into a home-computer setting without losing its focused, immediately playable character.
The result looks modest at first glance, but it has more going on than a quick volley across a green-and-black court. There are four difficulty levels, adjustable match lengths, an aggressive computer-controlled rival, and a selection of tennis techniques to use during play. It isn’t trying to be a massive sports simulation. Instead, it aims for the kind of crisp, repeatable match that makes you say, “One more game,” right before realizing you’ve been playing for half an hour.
From Game Boy hardware to a clean Z80 conversion
The connection to the Game Boy version of Tennis is more than a loose visual reference. The original handheld game ran on Nintendo’s portable hardware, powered by the Sharp SM83 processor. That chip is often described as a hybrid of the Z80 and Intel 8080 families, operating at 4.2 MHz.
ZX Tennis was created for the ZX Spectrum’s pure Z80 environment. According to the developer, the game’s code was manually adapted for the Z80 rather than simply being copied across unchanged. The ambitious part is that this conversion reportedly preserved the game’s speed, which matters enormously in tennis. A delayed serve or sluggish response can turn a fair rally into a small electronic tragedy.
That technical background gives the project a neat retro-computing appeal. It isn’t just another tennis game wearing a vintage costume; it is built around the challenge of translating a Game Boy-inspired experience into a different hardware context. The ZX Spectrum and Game Boy may share some family resemblance in their underlying technology, but they are not interchangeable machines. Making the game feel responsive on the Spectrum is therefore a meaningful achievement.
There is, however, one slightly cloudy detail. The developer has acknowledged that artificial intelligence was used during development, but hasn’t explained exactly where. Was it involved in code assistance, debugging, artwork, or something else entirely? I can’t say. That uncertainty doesn’t alter the game’s appeal, but it does make the development story less tidy than the finished court suggests.
A simple court with a surprising amount of play
The first impression is straightforward: two players, a ball, and a lot of green. Then the match starts, and the extra layers begin to show.
ZX Tennis offers four difficulty settings, giving the game room to accommodate both casual attempts and more demanding sessions. The computer opponent can be aggressive, so the higher levels don’t sound like a ceremonial walkover. A match-length option also lets players decide how much time they want to spend on court. That’s a useful touch in an era when not every retro game assumes you have an entire evening available.
The selection of tennis techniques adds another layer beyond simply returning the ball. During a match, players can perform different shots and use them to shape the rally. That turns each exchange into more than a reflex test. Positioning, timing, and the decision to attempt a particular technique all become part of the rhythm.
What works here is the sense of economy. The game doesn’t bury its tennis beneath elaborate menus or a mountain of statistics. It gives you a few meaningful choices and lets the match carry the drama. A well-placed return feels valuable because the game leaves enough room for you to notice the difference between a routine hit and a smart one.
My first thought was that the Game Boy foundation might make ZX Tennis feel too bare-bones on a larger screen. I reconsidered that pretty quickly. The compact presentation is actually one of its strengths: every element is easy to read, and the action stays centered on the rally. It’s not a showcase for visual excess, but it doesn’t need to be.
Black, green, and a crowd full of color
The court and players use a mostly black-and-green visual palette, an obvious fit for the ZX Spectrum’s restrained display style. Along the edges, though, the audience is much more colorful. The crowd creates a lively border around the playing area, giving the otherwise limited presentation a welcome bit of contrast.
Then there’s the umpire.
Perched in the judge’s position is Mario, Nintendo’s famous mustachioed mascot. It’s an unmistakable cameo, and it gives the game a slightly surreal flavor. The surrounding crowd looks like a colorful sporting audience, the players battle on a minimal court, and Mario sits above the action as if this were the most natural arrangement in the world.
The cameo is amusing, though it also creates the game’s most obvious visual question. Nintendo has historically been protective of its characters, and Mario is hardly an obscure background figure. Whether this remains a harmless homebrew wink or attracts unwanted attention is impossible to know. I’d be surprised if the character didn’t draw notice eventually, but perhaps that is part of the oddball appeal. Retro development has always had a soft spot for familiar faces appearing where they probably shouldn’t.
The visual design also illustrates the game’s central balance. The court itself is deliberately plain, while the surrounding details provide personality. It’s a bit like decorating a small bedroom with one spectacular poster: the space remains simple, but you remember the poster.
Why the formula feels immediately familiar
Sports games are often at their best when they communicate their rules quickly. Tennis has a natural advantage in that respect. The objective is obvious, the court is easy to understand, and every successful exchange gives the player immediate feedback.
ZX Tennis leans into that clarity. Four difficulty levels create a sense of progression, while the adjustable match length makes it easier to fit a session around your available time. The aggressive computer player adds pressure, preventing the matches from becoming passive back-and-forth routines.
There’s a mild weakness here, too: the basic presentation may not satisfy anyone looking for a deep career mode, a large tournament structure, or extensive player customization. But that criticism needs to be kept in proportion. Those features were never the apparent goal. ZX Tennis is built around the match itself, not the surrounding management game.
That focus can be refreshing. You aren’t spending ten minutes choosing a sponsor before hitting a single ball. You select a difficulty, choose the match length, and get on with it. Sometimes a racket is just a racket.
A small wave of AI-assisted retro sports projects
ZX Tennis arrives during a curious run of modern retro-style sports games created with the help of artificial intelligence. A golf simulator appeared first, followed by this tennis project. The two releases suggest that AI-assisted development is becoming another tool for creators working with older machines and familiar genres.
That doesn’t automatically make every result good, of course. A machine can help produce code or assets, but it can’t guarantee that a game feels satisfying in motion. Sports titles are especially unforgiving: the controls must make sense, the timing must feel fair, and the computer opponent must create pressure without turning every point into nonsense.
In that respect, ZX Tennis seems to understand the important part. Its appeal rests less on the novelty of its development process and more on the fact that it offers a playable tennis match with a clear retro identity. The technology behind the project is interesting, but the racket still has to meet the ball.
It also invites a few obvious wishes for future projects. If golf and tennis can make this jump, why stop there? Volleyball, basketball, and boxing would all fit comfortably within the same old-school sports tradition. A tiny ZX Spectrum boxing game, complete with a stubborn opponent and a crowd that looks like it’s been painted one pixel at a time, would be hard to resist.
A compact tennis game with real personality
ZX Tennis isn’t pretending to reinvent sports games. Its strengths are more practical: quick matches, multiple difficulty levels, an assertive computer opponent, adjustable match length, and enough shot variety to keep rallies from feeling completely automatic.
The Game Boy influence gives it a familiar foundation, while the ZX Spectrum conversion adds its own technical story. The black-and-green court keeps the image unmistakably old-school, and the colorful spectators help prevent the display from becoming visually flat. Mario’s appearance is an odd flourish—possibly too bold for its own good—but it gives the game an identity that a purely functional tennis simulator might lack.
I expected a straightforward conversion with little reason to linger. Instead, the small details kept pulling my attention back: the aggressive opponent, the different techniques, the strange crowd, and the question of how much artificial intelligence contributed behind the scenes. That doesn’t make ZX Tennis a heavyweight sports title, but it does make it an appealing little time capsule with a pulse.
The game is available through itch.io.
FAQ
- What is ZX Tennis?
ZX Tennis is a tennis game for the ZX Spectrum inspired by the Game Boy version of Tennis. It features arcade-style matches, several difficulty settings, adjustable match lengths, and multiple tennis techniques. - What hardware inspired ZX Tennis?
The game takes its basic design from the Game Boy, whose original Tennis ran on hardware using the Sharp SM83 processor. ZX Tennis was adapted for the ZX Spectrum’s Z80 platform. - How many difficulty levels are included?
ZX Tennis includes four difficulty levels. The tougher settings feature a more aggressive computer-controlled opponent. - Can match length be changed?
Yes. Players can adjust the length of a match, making it possible to choose between a quick session and a longer contest. - What makes the presentation unusual?
The court and players use a black-and-green visual style, while the audience is colorful. Mario appears in the umpire’s position, adding an unexpected character cameo to the otherwise compact sports presentation.
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