There appear to be some names for in-game multi kills. "Double Kill" and "Triple Kill" are self explanatory. Can somebody explain what are the numbers behind others, namely: "Ultra Kill" and "Rampage"? Also, I'm not really sure but there appear to be also names for killstreaks. In particular, "Godlike" is supposedly a name for a killstreak (again, I'm not sure how many kills you need to get this) rather than just another multi-kill name. Can somebody provide a comprehensive list here or at least pointer to such one?
Number of kills in a short time span (multi-kills):
Number of kills without dying (streaks):
The origin of this style of naming kill-streaks comes from Unreal Tournament.