"A Blast from the Past: Exploring the Amiga 1200 ROMs Pack"
Modern Amiga gaming relies on WHDLoad, a tool that installs cracked or original games to hard drive. Most WHDLoad slaves require Kickstart 3.1 (or 3.0) to be present in memory. The A1200 ROMs pack provides the necessary resident modules for these games to quit back to Workbench seamlessly.
For the games themselves (often referred to as ROMs in emulation circles), there are several well-known "packs": TOSEC: Commodore Amiga (2012-04-10) - Internet Archive