"It is not created yet" VS "It has not been created yet"
Tom: I want to play that game.
Koko: It's not possible.
Tom: Why isn't it possible?
Koko: 1. "Because it is not created yet." VS 2. It has not been created yet."
3. You can't play a game that is already not created.
4. You can't play a game that has not been already created.

Are 1, 2, 3, 4 all correct?

Question

"It is not created yet" VS "It has not been created yet"
Tom: I want to play that game.
Koko: It's not possible.
Tom: Why isn't it possible?
Koko: 1. "Because it is not created yet." VS 2. It has not been created yet." 
3. You can't play a game that is already not created.
4. You can't play a game that has not been already created.

Are 1, 2, 3, 4 all correct?

Answer

Tom: I want to play that game.
Koko: It's not possible.
Tom: Why isn't it possible?
Koko: 
1. "Because it is not created yet." - ok
2. It has not been created yet."  - Good
3. You can't play a game that is already not created. - nope
4. You can't play a game that has not been already created.  - ok

You can't play a game that has not been created yet. <-- "yet" better than already.
You can't play a game that is yet to be created.

Answer

"It has not been created yet." = This is the best way to say it.

"You can't play a game that has not been already created. " = You should change the word order to "You can't play a game that has not *already* been created."

Answer

2 and 4 are correct.