What is "razerpak"

Razerpak is a controversial client-side multiplayer hack/ cheat pack (pak) created for Quake, the first massively popular online multiplayer game. Razerpak contains a wide variety of elements from transparent walls and hacked player models to basic game configuration modifications which are aimed at covertly giving the user an advantage over other players in online play.

Razerpak gained much notoriety, both positive and negative, in the online gaming community in the mid to late 1990s despite being distributed largely person to person or within gaming clans. It emerged as a pioneer in what was to become an explosion in online multiplayer cheating and is widely considered to be the best cheat pack created for Quake.

A unique aspect of Razerpak is that, after QuakeWorld began implementation of anti-cheating measures by utilizing client datafile checksums, Razerpak was updated to include a modified (or 'hacked') QuakeWorld client-side executable which disabled the automatic (CRC) detection and set the correct (non-hacked) checksum values with an automatically executed script. This effectively created the illusion that a player utilizing Razerpak was not cheating.