The entire title is now free-to-play, with Valve only making money from microtransactions within the game.

FORBES: Valve's Team Fortress 2 Goes Free to Play

TF2 was where Valve first introduced free-to-play, as well as microtransactions with its hat system (among many other initiatives).

ENGADGET: Valve's Joe Ludwig on the uncertain future of virtual reality and partnering with Oculus

With any luck, that input will start rolling in soon: Valve is preparing to update its popular free-to-play shooter, Team Fortress 2 with a Rift-compatible VR mode, openly describing the update as an experiment.

ENGADGET: Oculus' Palmer Luckey and Nate Mitchell on the past, present and future of the Rift

We've known for some time now that Valve was working on virtual reality support for its perpetually updated free-to-play shooter, Team Fortress 2.

ENGADGET

Valve is eschewing the sort of dramatic overture popular in the tech world, preferring instead to play a game of inches.

FORBES: Valve Could Be Moving Hardware into Beta Sooner Than You Thought

We're more excited for what fruit this giant beta test bears than we are to play existing titles with a new headset, and it's good to hear that Valve is too.

ENGADGET: Playing an actual game with Oculus Rift: hands-on with Valve's Team Fortress 2 'VR Mode'