i tried to go into Mr House's antechamber and got zerged by securitrons.

Grow stronger? or find the keys and overrides?

okey dokey

Try to sneak in, thats what i did...

I'd just run thru it really quick, i think once you kill house the securtrons quit attacking you. Maybe try a stealth boy

There are these things in the game called "Stealth-Boys," see....

Thank you, O wise one.

Or you could go to vault 34 and get the pulse gun, one shot every securitron in that place.

Edit: Dont forget and go to Nellis and get the key first though, unless you've got 100 lockpick.

Run like hell?

I believe there's a terminal across from the elevator to the Control Room (not next to the elevator) where you can affect the Securitrons if you don't have the Pulse Gun.

Pulse gun! One shot one kill!

I used an AMR it works wonders on lots of things like Deathclaws and Secruitrons. I also have a sniper's mentality so i am always working an angle, sometimes i will put a round through a gap just wider than the cross hairs on the optics, that is always fun. I once started at the NCR compound with a silenced sniper rifle and AP rounds and worked my way down the strip popping securitrons from cover at range. It was not until the securitrons right outside of the lucky 38 that the frist seruritrons started to fight back. After that i just waltzed into the lucky 38 shooting everything that moved until i opened Houses chamber and put a bullet in his melon. I did all of this just to be mean after wards i reloaded the save and played normally. So .308 or .50 works well on securitrons, with the AMR you do not need to shootem in the TV screen like you do with .308 for a one shot one kill.

Hope this helps.
Asai

Dang! I've been ninja'd!

Also, doing the brotherhood quests and getting power armor will probably help. Not to mention reaching level 30 before fighting.

The Pulse Gun is the best option of course, but getting it from the Vault 34 armory isn't
exactly a stroll in the park. Pulse 'nades and mines are cheap, easy to come by and
quite effective vs. all kind of robotic opponent, no matter how hardened their armor is.

Run yo ass through them and hit the elevator door realfast, then when you ice the old man and come back up stairs, they're friendly....

It also helps to have some stims hotkeyed....