A game changer blogpost

Literally.

Reported in A Plan to Mine the Minnesota Wilderness Hit a Dead End. Then Trump Became President.  (The New York Times, 6/25/2019)

The Merriam-Webster entry does not include a hyphen between the words whereas the New York Times article does.

According to Merriam-Webster, the first known use of the compound noun "game changer" occurred in 1993.

Other coinages from the same year include:

1. access provider
2. body camera
3. booty call
4. dwarf planet
5. jukebox musical