Periodically, digital storefronts and subscription services offer the full version of Quake 4 at no additional cost:
: This service has frequently included Quake 4 in its "Free Games with Prime" lineup, providing users with a redeemable code for a DRM-free version on GOG.com . Quake 4 Free Download
: Keep an eye on the Epic Games Store or GOG during seasonal sales, as Bethesda titles often appear in their free rotation. Where to Buy Quake 4 featuring three maps: Verticon (Tournament)
: An updated multiplayer demo (v1.4.2) is available, featuring three maps: Verticon (Tournament), Over the Edge (DM), and Speed Trap (CTF). Over the Edge (DM)