10 Incredible Video Games The Industry Will NEVER Do (And Why)

Speaking of Valve. Crossovers, whether in video games, comic books or films, have time and time again proven to be some of the most lucrative projects available.

So, why don’t more people do it?

Some try, some plant the seeds of an attempt, and others fail miserably due to their blind, unprepared rush. However, there are a few select companies that have the potential of creating a successful, seamless crossover that would make perfect sense.

Half-Life, Portal and Left 4 Dead are three examples of Valve's unique characters, environments and motivations, while still holding similarities between them.

For instance, zombies are rampant in Half-Life and there's been the implication of a feud between Black Mesa and Aperture Science since the original Portal released. Somehow, even if it was in an experimental, fan service-y format that just uses the character line-up for familiarity, I think it could be successful.

Going beyond that, though, it's surely pure fantasy. Valve are some of the most stubborn, tight lipped, adamant developers to ever grace the industry. They have enough money rolling in via Steam to never make a game again.

They still do, though and whether that's reason for or against a crossover is up to you. Regardless, I can only dream of the interactions between Gordon Freeman and Chell, GLaDOS and the G-Man or even Cave Johnson and Eli Vance.