Cyber Police ESWAT is a 1989 scrolling shooter arcade game developed and published by Sega. In 1990, Sega released a Mega Drive/Genesis version known in North America as ESWAT: City Under Siege. It was ported to the Amiga, Atari ST, Amstrad CPC, ZX Spectrum, Commodore 64 and Sega Master System. More information on Wikipedia.

IFFL is short for Integrated File Flexible Loader, and was a method employed by C64 crackers to combine several datafiles into a single, larger file. The first IFFL tools and releases appeared in 1990.

A trainer offers one or more cheats like unlimited lives, invincibility, more ammo etc. Because this is done during runtime a trainer is not to be confused with a savegame editor.