game changer vs game-changer

Some examples from the web:

• The open sourcing of classified information is going to be an absolute game changer for journalists of our generation.
• This hack has been a game changer.
• Now that is a game changer,
• Now that is a game changer, because it shifts production away from the developing world and into the Western world.
• Why, this festival could be a game changer for Middleton.
• This exhibit is a game changer for me.
• The real game changer was filling Lehder's planes with coke instead of weed.
• Was Chicago a game changer for your company?
• Can't show you here, but it's a game changer.
• Getting a conviction on Wahl should have been a game changer for you.
• If you follow me I swear to you it's a game changer.
• If it goes viral, this could be a game changer.
• Dubbed "The Drainer" by it's inventor, Harley "Triphammer" Cohen, this device may be the game changer Powers Law Enforcement has long sought.
• Me? - This is a game changer!
• "Game changer." Apparently, they've been looking for her for years, but she's not in the system.
• Another plaintiff is a complete game changer.
• They're a monstrous game changer.
• That could be a historical game changer.
• But this could be a game changer, Kenny.
• The open sourcing of classified information is going to be an absolute game changer for journalists of our generation.

Some examples from the web:

• Definition of GAME CHANGER. : a newly introduced element or factor that changes an existing situation or activity in a significant way. ADVERTISEMENT ...
• This type of company switches up and forms a new business strategy in order to compete directly or indirectly with competitors. A game changer changes the ...
• This item:Game Changer by Johnny Gill Audio CD $11.99 ... to love and appreciate, the incomparable Johnny Gill is back with his latest album Game Changer.
• Game Changer ... Game Changer ..... The title track, "GAME CHANGER" is just another splendid cut, once more, a well put together song, expressing stability ...