For level 8, I would say either Commando( 2-handed weapons ) or Gunslinger ( 1-Handed Weapons ), these Increase V.A.T'S for the specific one of choice.
You have to be level 10 and require the certain skills for it to be available.
no. once you level it should become unavailable as a perk.
no, the max level cap is 30 and the here and now perk would be grayed out.
At level 30 there is the last perk. Thats all i can say
its in the ruins of DC if you get to level 20 take the explorer perk to reveal it on the map
Level up and get the cannibal perk then click on a dead body and you should have the option to "devour" the body
To become level 31 in Fallout 3, reach level 30 and than use the perk which allows you to level up automatically. This lets you hit 31 and to let you have your stats increase. Note that this isn't a bug and its meant to happen intentionally by the game developers.
My personal favorite is Grim Reaper's Sprint. However, the best one to get early on would be the Swift Learners.
get to level 20 and get the explorer perk and then every location on the map is reavealed good look finding it
contract killer perk
you can't unless you have the solar powered perk.
There are many ways to kill characters on Fallout 3: Shooting Grenade Mines Missiles Mister Sandman perk (level 18 perk, useful in Rivet City when you want to dominate the town) Mini Nukes (350 per nuke) Endless ways.... use the way that works for you! Hope these options help :)