Artic Invaders + Galaxians mod

In 1982 Artic released two excellent arcade clones written by William Wray for the humble 16K Sinclair Spectrum: Invaders and Galaxians.

Both titles were superb for their time, with smooth graphics, decent sound and good arcade accuracy. For me, however, there was always one small niggle: the player's bullet speed in both games felt a bit too slow - at least compared to their arcade counterparts.

Being 16K games, it wasn't too hard to disassemble the Z80 code and identify the relevant parts, and then make modifications to address the slow bullet speed.

Respecting the wishes of the current copyright holders who have restricted downloads of the games to third parties, I won't be offering modified forms of the games here. 

Instead, the original games can first be officially downloaded from their respective pages at Spectrum Computing: Invaders, Galaxians. Then the Invaders and Galaxians mods - provided here in the form of a .pok file for each game - can then be applied in an emulator once the game is loaded and running.

For example, to play Invaders with the faster bullet mod, download Invaders from the above link, open it in a Spectrum emulator and run the game. Then apply the Invaders faster bullet.pok mod file downloaded from this page. 

In Spectaculator emulator, for example, you can drag the Invaders faster bullet.pok file over the running game to apply it.

In ZX Spin emulator, select Tools > Poke Memory. Then from the Poke Memory tab, click Add From File, navigate to and click the Invaders faster bullet.pok file to apply it.