Changing roms

In ancient times: proto-videogaming
Early home consoles and arcade games - at resolutions that would give their original developers heart attacks

Arcade
MAME (Multiple Arcade Machine Emulator) is a massive, sprawling monster compared to any other emulator in this feature. At the time of writing, this program supports over 3,000 games and, with new releases every month, that’s only going to grow. Its approach is one of total purity, attempting to emulate arcade games with pixel-perfect accuracy. It has an omnivore approach to games so in theory modern titles are supported too, though they’ll play like a dog unless you can bring back a processor from the future.

Get it working

Above: 'Member these?

Essential games

1942
Or 1941, or 1943 - whichever version you prefer. This was one of the earliest, best-loved vertical shooters, and though it seems incredibly simplistic compared to, say, Ikaruga (see the Dreamcast section), it remains compelling and challenging. It also has a refreshingly cavalier attitude towards historical accuracy.

Robotron
The dual-stick control (one to move, the other to shoot, requiring a truly multi-tasking brain) is a mechanic that never really ages - from Smash TV to Geometry Wars, it just keeps on coming back. This was its strongest parent, and it’s still bastard-hard.

Golden Axe
One of the definitive keep-shoveling-in-coins side-scrolling beat-’em-ups, there’s an enduring idiocy to this. Unleashing a full-potion special attack, kidnapping a fire-breathing lizard mount or kicking the snot out of a thieving imp remains a heartwarming joy.

Street Fighter II:Champion Edition
Also available in SNES or Genesis flavors, but the arcade version of the expanded Champion revision of SF2 feels the most authentic. There’re about a dozen different cloned/hacked spin-offs, but you’ll need the original 4Mb “world” for any of them to load.