15 Most Expensive Games That Flopped

Halo MMO – $90 million

The Halo franchise has seen some major successes in its illustrious history but it’s also dotted with plenty of failures. Case in point, the Halo MMO that Ensemble Studios (who developed Halo Wars) worked on, under the name “Titan”, which never released. The project cost a whopping $90 million and was simply cancelled without any formal announcement by Microsoft. Some speculate that its stories ended up being used for Halo Legends, the original anime compilation.