The perk was added to TTW in 3.3 by our glorious overlord RoyBatty. The perk gives +10 damage bonus with all 1h and 2h melee weapons. I originally picked up the perk to make my baseball bat a little more viable. I later discovered, it seems like there is a scaling issue with the ripper and chainsaw. This perk basically turns them into an instant death wand. I presume because the weapon damage is "continuous" the +10 damage bonus is just multiplied exponentially (per damage tick?). I wonder if this was why the perk was tabled for the official release?Swing for the Fences is a perk found in the data files of the Fallout 3 add-on Point Lookout. It does not appear in the game and can only be obtained with console commands.
Here's a video showing a comparison of killing a super mutant behemoth with the perk on/off.
https://youtu.be/57hTHR0lWM8
(I had recorded a bit of voiceover but i guess the recording didn't pick it up )
With the perk on, the behemoth is slain in about 3s. Without the perk, it takes a little over 30s to kill the behemoth. That's a huge difference!
Just a curious observation that I've not really seen discussed here or around the web. I'll probably opt out of retaining this perk on my character using the player.removeperk command, as it makes the game a little too easy .