All I need to know is whether or not this game can go in your CD-ROM drive and work. I bought Sims 2 double deluxe a year ago, assuming that it would work because it said "PC Game" on the front cover, but it only worked in the D drive, not in the C (CD-ROM) drive. I know that the regular Zoo Tycoon 2 and Zoo Tycoon 2 Endagered Species expansion packs are both CD-ROM; I just wanted to make sure before buying the Ultimate Collection that it was CD-ROM like the others because it's newer.