I was in South Africa at the time (around '78?) and it came with just a free Space Invaders cartridge.
I bought the Asteroids cartridge, all-excited 'cause I was crazy for the arcade version (still am!) and figured that seeing as said version was created by Atari, it'd be great. Nooo. Huge disappointment when I saw the "blocky" graphics and the fact that when you rotated your ship there were only 9 (I think) possible orientations, whereas the arcade version's vector graphics gave you a seemingly-limitless granularity. It wasn't limitless, but you could aim at a rock or ship and blast it quickly without having to wait for it to enter your "sights", such as in the console's version.
After that I bought an Atari 400 and programmed my own games in Atari Basic. The cartridges for that were $105 AU, which as you can imagine, was a packet back in the early '80s.