KingdomFantasyXIII said:
Actually XIII-2 sold quite well for a spinoff. It was one of the two games in Fiscal year 2011. Lightning Returns is selling okay.
I could go into a long rant over the FFXIII series, but I'll try to be simple.
FFXIII-2 was profitable for a "spin-off", that is true, and I won't deny it. It still took nearly two full years to sell 2 million copies, however, but it was made using 80% of the assets FF13's development didn't have a place for. However, considering FFXIII sold around 6 or 7 million, I believe, it had a drop-off rate of nearly 60-70%.
Lightning Returns, however, didn't exactly sell "okay". It was marketed to be their "big" Final Fantasy release this quarter, the finale to the whole trilogy, and heavily adapted with more action to appeal to the west and a wider audience.
LR was instead outsold by Bravely Default and the decade-old port of FFX in several key territories. Its launch week sales were a whopping 70% less than FFXIII-2's were. The series didn't grow; it shrank by a huge margin. For perspective, the widely reviled Dirge of Cerberus spin-off outsold LR. Most franchise get bigger and better over time, while the FF13 series got less favorable reviews and less sales. FFXIII-2 was already a fraction as successful as FFXIII, and LR is only a fraction as successful as FFXIII-2.
Now, to be fair, LR was made on a much cheaper budget than the other games (and it looks cheaper all around), but it was supposed to be Square Enix's biggest game of the quarter... and instead got trounced by the likes of Tomb Raider's re-release, the FFX ports, Bravely Default, and the surprising success of A Realm Reborn.