A Decision Made by the Power Grid
The root cause has nothing to do with video games. North America distributes mains electricity at 60Hz; most of Europe uses 50Hz. Early television standards were built to synchronise their vertical refresh to the local supply — a sensible engineering decision in an era when doing otherwise invited visible interference — and so NTSC televisions refresh at roughly 60 fields per second while PAL televisions refresh at 50.
Early consoles synced their output to the television. The consequence, once games were being written in Japan and America and shipped to Europe, was that the same code found itself running on a machine that ticked five times for every six ticks it expected. Everything that was tied to the refresh rate — which, in an era when games ran their logic once per frame, meant essentially everything — ran slow.
Seventeen Per Cent
Fifty is about 83% of sixty, which means a game ported carelessly from NTSC to PAL runs roughly 17% slower than it was designed to. That is not a subtlety. It is the difference between a game that feels tight and a game that feels like it is being played underwater, and it applies to every aspect of the experience at once: movement speed, animation, enemy behaviour, the scroll of the background, and the music, which plays back at a lower pitch and a slower tempo because it too is driven by the frame clock.
The correct fix was straightforward in principle and laborious in practice: reprogram the game logic to compensate, so that the PAL version performs the same amount of simulation per second despite rendering fewer frames. Some developers did this. Many did not, because it meant retuning a finished, tested, shipped game for a secondary market — and the European market, through much of the 1980s and 1990s, was exactly that.
So Europe played slower games. The Mega Drive Sonic the Hedgehog is the canonical example, and the irony is exquisite: a game whose entire identity is speed, delivered to an entire continent at 83% of the speed its designers intended.
The Black Bars
The second insult was spatial. A PAL television draws more scanlines than an NTSC one — the lower refresh rate buys more vertical resolution. A game written for NTSC produces an image with fewer lines than the PAL display expects, and unless somebody reworks the graphics to fill the extra space, the result is a picture that does not reach the top or bottom of the screen.
Japanese and American developers rarely did that rework. So European players received games rendered in a letterboxed strip with thick black borders above and below — a smaller image, on the same television, for the same money. Combined with the slowdown, the PAL version of a game was frequently inferior in every measurable respect to the NTSC one, and it typically arrived months later.
Nobody Knew
The strangest part of the PAL problem is how invisible it was to the people it affected. A European child playing Sonic in 1991 had no NTSC console to compare against, no internet on which to learn that their version ran slower, and no reason whatsoever to suspect that the game in front of them was a degraded copy. It was simply what Sonic was. An entire generation grew up with a version of the medium that was, unbeknownst to them, systematically slower and smaller than the one their American counterparts were playing.
The awareness arrived retroactively, largely through the internet and the emulation scene, and it produced a genuinely peculiar retrospective grievance — thousands of adults discovering, decades later, that the games of their childhood had been quietly wrong. Modern hardware runs at 60Hz everywhere and the problem is gone, but the PAL era remains one of the clearest illustrations in the medium of how deeply the physical infrastructure of a country can reach into the experience of playing a game — all the way down to the frequency of the electricity coming out of the wall.