Some people try to claim Halo is a big seller because it is a great game series, but there is undeniable evidence that the game only sells because:
A. Mass bundling
B. The price is cut quickly, turning it into a bargain price game.
Let us take a look at the biggest selling Halo game, Halo 3.
- Halo 3 bundle special console bundle
- Halo 3 regular console
- Halo 3 and ODST console bundle
- Halo 3 and Halo Wars console bundle
- Halo 3 and Fable 2 console bundle
- Halo 3 and ODST and Reach console bundle
- Masses upon masses of retailer created bundles
- Lost count of the others, but are more
The games price also dropped between 33-40% depending where live in only a couple weeks. Nearly every Halo game gets mass retailer bundles and nearly all of them official console bundles too. The price drops heavily fast for all of them too, even Halo 4 was only £20-25 less than two weeks after release. Quick price drops mean there was not enough demand for the stock.
"But wait, Halo games always review well" you say? Doesn't matter, plenty good reviewed games fail to sell, or bad reviewed games do sell.
"But wait, it would have sold that much anyway, Halo doesn't need bundles or price cuts" you try and claim? False.
The evidence, the only main Halo game that hasn't sold several million Halo CE Anniversary. HCEA is the only mainline Halo game that hasn't recieved mass bundling and didn't get a price crash for long time, it has also barely sold 2 million copies, compared to bundled and price crashed games which sell between 6-12m.
...and that is the undeniable evidence, the only Halo game that ever needed stand on its own two feet and it failed to sell anywhere close to the other games. You cannot argue this because there is no other non-heavy bundled or price crashed Halo game to use as an example.