Pros
I have to thank Riot Oceania for giving me one of the best opportunities I've ever had to advance my career and achieve my goals. I was a pretty scruffy candidate, all things considered, but they chose to believe in my potential nonetheless. They take their recruitment very, very seriously -- every single word on the website about their culture and values is 100% true. I really appreciated the honesty from the interviewers and recruiters at every stage of the process. It didn't feel like "are you good enough to tick these boxes", but rather "are you the right person for us, and are we the right company for you". The work is so rewarding at Riot. As a League of Legends player of seven years, I really felt like every single thing I shipped added value to the game and to Oceanic players. People talk about Riot OCE as an Australian arm of the company, and I think that's a pretty good way to sum it up. The office banter is great, most people there are gamers like you (hopefully you're a gamer or I'd think hard about whether you really want to work for a games company!), and feedback is always welcome and available. You'll also have a lot of opportunities to pick up other skills while at Riot. Although Rioters can come off as a little irreverent about including you in their own projects, you can relax knowing that they're always coming from the right place -- they believe you can add value, and they're really happy to work with you. The office is awesome. I drank more orange juice and consumed more Shin Ramyun in my time at Riot than the rest of my life put together. Being able to play games at work is a neat bonus that actually helps you do your job better too (although I limited my Dota 2 time to after hours...).
Cons
I can't speak for others, but for my position, there really wasn't much in the way of work/life balance. Ultimately that's why I decided to leave. But retrospectively, I think it was only this way because I was so committed to Riot's mission that I gave too much of myself to it. Riot do their best (within reason) to get you to your important family events, soccer games, church, whatever, but sometimes the nature of the job just doesn't allow for it. The training could be better. I came in with a bit of a lopsided statsheet, and it took me ages to get up to scratch with the other aspects of the job that I wasn't experienced in. It was partly on me because I didn't ask for enough help, but I still feel that I was underequipped for my first few months. It can be frustrating working for a regional office like Sydney, too. You join Riot wanting to be a hero for the players, but once you learn about and understand all the things that are holding Riot back from getting stuff out the door, you feel awful whenever you see a player asking for something that you personally can't deliver on (without sacrificing your personal time).