I think "RollGroup"s seem to be things that belong to the same roll. For example, if I have a lockbox This is a line from Grimy's (I don't know what the +- mean at the start). -LootTables = ( TableName = "Archon_TimedLoot", Loots[0]=(Chance=100,MinCount=1,MaxCount=1,TemplateName="EleriumCore",RollGroup=1), Loots[1]=(Chance=45,MinCount=1,MaxCount=1,TableRef="MidAlienWeaponUpgrades",RollGroup=2), Loots[2]=(Chance=25,MinCount=1,MaxCount=1,TableRef="LateAlienWeaponUpgrades",RollGroup=2), Loots[3]=(Chance=25,MinCount=1,MaxCount=1,TemplateName="AlienDatapad",RollGroup=3) ) This one has TWO entries in rollgroup 2, which means there's 45% chance of 1 MidAlienWeaponUpgrades and 25% chance of 1 LateAlienWeaponUpgrades from that drop. You will also get 1 elerium core (100% chance) and 25% chance of 1 alienDatapad. I think.