Hey I was wondering if anyone could answer my question.

Is it possible for my younger brother to play Team Fortress 2 without having to buy his own copy and without it affecting my stats in any way?  I was hoping someone could know because even if he creates his own steam account it won't let him play any of our already installed games.

He can play from any computer using your Steam account, but you won't be able to play at the same time. He needs to buy his own copy if you want to play against each other.

As for playing on your account and not affecting your stats, I'm not sure if that's possible either. I assume it's possible to turn off stat-checking, I'm just not sure how.

Alright, well I hope theres some way to have it not affect my stats. If not I just lost a ton of respect for Steam.

 I think the whole point is that they hope your vanity in your stats will prevent you from just letting all your friends use your steam account.  Otherwise you could litterally just give all your friends your steam password and they could download and play all of your steam controlled games for free.

They have to try and control things somehow and compared with stuff like securom and the like I think I prefer this quite a bit.   

 Really?  You lost respect for Steam just because you can't let others play your games without affecting your stats?  

1) It's free...and miles above Windows Live functionality, which you have to pay for.

2) If you have someone (like your little brother) playing under your username, I don't understand why the stats shouldn't be recorded...it's not like stats are that big of a deal anyway.  He should just buy the game himself.

3) The stats system is new for Steam, TF2 is the first game to use stats in Steam extensively...give them a break.

4) You want to have two people playing a game at once. This requires two copies bought under any sane business model*. You are the one with too high expectations.

*Open-source is not a sane business model, just a good one.

Dude, I never said I wanted to both play at once. My younger brother wants to play the game on my computer and I was just checking to see if I could have it not affect me stats.

The reason why I am mad about it is other games such as Battlefield 2 or Warcraft 3 or something you can play on other peoples computers and just create your own account. Since the CD key is set you couldn't just give them the game.

Also you couldn't just hand it out for free, only one person can be on per account at a time just like with every other game using CD keys. So anyone that would hand it out to all their friends for free pretty much makes it so they can only play a fraction of the time since their friends would keep signing on and you could never play together.

And I hate Windows Live, its completely pointless, the PC gaming community was perfectly fine online wise before it and its just some trick by Microsoft to get PC gamers to have to pay like their console gamers do.

And where did you ever even get that I wanted to play with my brother at the same time? I never said that ever and if you read it I said it won't let him play any of our already installed games implying that its on the same computer... Its obvious we couldn't play at the same time because thats how CD keys work, its just I think its retarded that the account is attached to the CD key.

In a game like StarCraft my friends could come over, go onto Battle.net and create their own account then play with me on one of my computers and then when they got their own copy of StarCraft later they would still have all their stats and stuff.

The only one CD key playing at a time thing is fine in my opinion, but not letting other people log on in their own accounts is just stupid. I had hoped it would let you play any installed games on that computer using Steam.

Yeah, but the problem is that you use Steam to install and play the games. If anybody could play the games that were installed on your computer, then that would require Steam to recognize your specific computer, and only work on your computer...because otherwise you could log into Steam on a different computer, and then other people could play on that PC, and another PC, etc.

With games that just install with a CD or DVD, it's tied to your computer and your computer alone, so anybody who uses your computer can play that game basically.

With Steam, you can install a game on any PC with internet, on multiple PCs, so you can't just let anyone play your installed games, because they're allowed to be on multiple PCs.

I understand why it's annoying to you, but if Valve let users share their games with other accounts, the whole system wouldn't work.