We're excited to announce that we've fully migrated the Xbox Forums to their new home, here on the Microsoft Community forums!
As of today, going to forums.xbox.com will redirect you here to the Xbox area of the Community forums. We've moved all of your existing threads over so you can continue and start conversations with the new forums experience.
We sincerely appreciate the feedback you have provided over this transition and can't wait for you to check out the new Xbox Forums!
Its actually really easy to get those last two achievements. Just sell enough of your old stuff to make space in your garage so you have room for 5 tanks, then buy five of one group to pop the achievement. Then come back the next day (Because there is
a limit to the number of tanks you can sell in a day apparently) and sell the five tanks you purchased the day before and replace them with ones from the last group. Thats how I handled it, and I had all three in the first three days I played. After that
I simply replaced tanks I had with ones that I wanted as I played.