Sorry for the late reply!
Spectrums were among the first home computers, starting with the ZX81 in about 1980, progressing to the 16K and eventually the much loved 48K Spectrum with it's unreliable 'rubber keypad'. They came out shortly after those big old Atari consoles. They were invented by Sir Clive Sinclair and competed in the marketplace against the
Commodore 64 for the attention of spotty gaming nerds.
You had to load Spectrum games using audio tape cassettes. This improved the popularity of the computer, as everyone could steal software by 'home-taping' onto cassette, much the same as recording albums onto mix-tapes.
Thing is, because the graphics and sound were so crappy, software engineers had to concentrate on producing addictive game concepts, so the playability made up for lack of style. This is not to say all the games were good - there's tons of bad titles, but many of them went on to influence some of the biggest gaming franchises in history.
A few examples of good Spectrum games -
Halls of the things - see 'Doom'
Turbo Esprit - see 'Grand Theft Auto'
Manic Miner - see every platform game ever!
It should be noted that many Spectrum games are still as infuriatingly addictive as when they came out. One strategy game - 'Rebelstar' still works because it's largely conceptual, in the same way Chess is still playable.
There were also a number of early film 'tie-ins'. Although Atari lays claim to the first example of such a medium, with the dreadful
ET , Spectrum caught up fast and produced titles such as
Alien,
Airwolf and
Evil Dead.
Unfortunately, Spectrums were just too dated and clunky and died out in the late 80s/early 90s, replaced by Amigas and Atari STs.
You can still play the games on numerous websites - just do a google search for 'Spectrum games online' or whatnot.
My favourite titles (amongst others) include -
Renegade
Manic Miner
Rebelstar
Saboteur
Bruce Lee
JetPac
Alien
Jet Set Willy
Chuckie Egg
Knight Lore
Lamatron
Stop The Express!
Eric and the floaters
Dubious mention also goes to the film tie-in based on
Deathwish, where you got to blow up old ladies with a rocket launcher.
You'll probably look at the games and think they're rubbish, but as a snapshot of where it all started, the ZX Spectrum is worth checking out.