Fallout and Unlocks

I saw it, read up on it, but didn't think too much about it.
Achievements in Fallout New Vegas.

Like this one, while in the desert, I was randomly killing mutated ants, or radscorpions for experience, and on my 50th kill, I got the achievement and an associated perk (passive buff): Bug Stomper.
Granted, it didn't tell me how much I was buffed, its still something new I can work on in the game.

Note: Friend of the Night perk is amazing; when it gets dark, your eyes get attuned to the darkness and it becomes incredibly bright (not daylight, but you don't fear the dark anymore). BUT it doesn't always work; especially indoors. Still when it works, its marvelous.