I am confused between these two and wanted to know which sentence to use:
1)I was working as a developer on Johns game.
2)I was working as a developer on John's game.
From the little research that I did, it seems like I need to go with the first one. Because John's basically means "John is". Kindly let me know if I am correct and which one should I go with.
More context.
John is the name of a company/owner of the game.
With your edit providing additional context, it is now clear that you would use the possessive form:
I was working as a developer on John's game.
The use of apostrophe "s" can indicate the possessive, as in this case, or a contraction of "John is," as in the following example:
John's a great friend to have.
If the game belongs to, was created by, is associated with, etc. John, then it calls for a possessive which is known as the genitive case. Because English does not decline nouns for case, it is necessary to add 's as a marker of possession.
If you were to write it as Johns game, then it would imply that the name of the game is Johns.
And as you've mentioned, John's can less commonly indicate a contraction of is (i.e. proper noun + is), but this is generally only appropriate in informal speech and writing.
