10 Most Baffling Crossovers In Video Game History

6. Lego Rock Band

In the long, sordid history of the great Rock Band vs. Guitar Hero war, at one point the battle stopped being about who could release the best main-series games, but who could create the most appealing spin-offs tailored to specific music tastes.

It kicked off in 2008 when Guitar Hero released an Aerosmith-flavoured game, with Rock Band responding by dropping a Beatles-themed title a year later. Upping the ante, Guitar Hero released the double whammy of Van Halen and Metallica in retaliation, a one-two-punch which Rock Band tried to counter with... Lego Rock Band?

Aimed at a much younger audience, the 45-song tracklist was surprising decent, even though it included more family-friendly tunes that parents wouldn't mind their kids moshing out to. Obviously the entire game got a visual overhaul to fit the style of the other franchise as well, with even the notes being replaced with lego bricks. Very imaginative.

During the twilight years of music rhythm games the developers of the two main series threw just about every idea at the wall in the hopes that something would stick, but it's still unclear why anybody thought cross-brand synergy with the similarly dime-a-dozen Lego games would be enough to save a floundering genre.