Avantages
"Fun" environment, where people get to shoot each other with nerf guns, you get to play the game and see new items before they are release, and a bunch of company perks. Direct peers are super nice, although there can be some negative/draining people there.
Inconvénients
I'd have to write a book about all of the things Riot Games does wrong in running a company. Here's I'll just list a few to help you determine whether Riot Games is right for you. When I first started at Riot Games, I was like awesome, a game company. After about three months, I would ask myself "why are they running the company this way? Don't they realize people aren't happy with doing it this way?" I would bring my voice to upper management--because Riot Games prides themselves on open communication--and management would say "We don't follow conventions. We like to consider ourselves unique." Ok, I get it. They don't want to run a "corporate" environment, but when the company gets to the size they are (>3000 ppl world wide) there needs to be some sort of standard and compromise for growth and communication. As time went on, I would no longer see people that I would normally see. I found out they were "let go", but no one could give me an explaination of why. Shaddy if you ask me. So, if you want to work here...be prepared to come in late (11AM) and stay late (past 8PM). If not, you will be considered part of the "out crowd". It's true, Riot Games is very frat like. If you're not in the "boys club" you're not going to make it. You have to be a bro, do all the bro things, and make Riot Games your life. I don't recommend working at Riot Games unless you are new to the corporate world, meaning you don't have any prior corporate experience. Because if you do, you'll be highly dissappointed and frustrated with how management works, or doesn't work actually. Maybe you can join for a year, just to get them on your resume. You might survive. If you love the game, great. Don't make the game your life. Continue to play the game, which is fantastic, but don't make it your life. Oh, and if you're trying to move up in a company, it's not going to happen at Riot Games unless you come in as a manager.