I noticed that I have a fair number of vault credits and had a few questions. Quite a few of the titles are for steam credit purchases. I haven't used steam before. Are the titles for specific games or are you using your vault credits for the steam credits? I'm asking because my kids got Terraria through steam last night, but I did not see it in the vault. I wasn't sure if I could use my vault credits to get Terraria or not.