First of all, I want to say this was a great decision and long overdue. The MMO Rift which came out around the same time as GW2 reportedly had the highest amount of new players ever once they had their f2p launch on Steam. If you're at all familiar with the Guild Wars 2 subreddit, I'm sure you've noticed that there are constantly new posts by people who are shocked by how much they like the game and the fact they've heard next to nothing about it - I'm certain a Steam launch will draw in new players that will stick with Guild Wars 2. I'd really like to see this transition go well, so I'd recommend the following things: 1) Incentivize current Guild Wars 2 players to log in and put in hours through Steam. - I recently decided I wanted to pick up a looter-shooter and I was deciding between Destiny 2 and Warframe. Ultimately I went with Destiny 2 first because it had twice the amount of players logging in that Warframe did at the time. Set a time frame where veteran players get some exclusive or rare items when logging in through Steam. Make it worth it. 2) Cross promotion - I'm not sure if Valve really does this much anymore, but I know with Team Fortress 2 they did lots of cross promotion cosmetics, for example buying Deus Ex net me some TF2 cosmetics based on items featured in Deus Ex. I believe the same thing is done with DOTA2, and the high fantasy settings mesh with GW2's well. I really think if this option is available that it should be leveraged. Maybe doing a quest in GW2 ties to unlocking an achievement in your Steam profile, which unlocks a skin for DOTA2. 3) Steam Marketplace - Not many developers really engage with the marketplace and that's a missed opportunity. I realize the amount of work it'd take to consolidate the player's entire inventory on Steam, which is why I think a "giftwrap" option would be a good idea. Basically you buy a piece of wrapping paper from the gemstore and you can put a tradeable item inside of it, which transfers it to your linked Steam account Inventory, which can then be sold on the marketplace. I'm not sure if devs get a cut from the market purchase, but you'd be making money on the wrap at the very least. 4) Steam Cards - more of an afterthought really but having Steam cards, emojis, backgrounds etc is always nice. I'm positive simply having GW2 available on Steam will draw in new players, but I really do believe that if Anet goes the extra mile in integrating and promoting within Steam, it could be the flagship MMO of the platform.