At the Gamefest 2008 event on Tuesday, Microsoft announced that all Games for Windows Live multiplayer features are now free. These features -- including multiplayer achievements, matchmaking, cross-platform play with the Xbox 360, GFW voice chat, and more -- previously required a GFW Live Gold account. The change is effective immediately and across all GFW titles, both past and future.
Other changes to the service were also announced, hit the jump for full details.