RuneQuest 6: Firearms
RuneQuest 6 has been available for a few months now, and I really wish I had the time to write an in-depth study of the consequences of using RuneQuest 6 as the engine of your TCE games. Some day I hope I'll be able to post something.
In the meanwhile, I really urge you to download the free Firearms supplement for RuneQuest 6 on the Design Mechanism's web-site.
Page 12 should be of particular interest for pre-European contact games, or for encounters with very early Portuguese or Dutch colonists.