hey..
we have created a game for our class.. the game file is TheGame.unity and Unity publishes a TheGame.exe file when said to publish.
I want to be able to create an installable file for publishing the game..
How do I do that ?
DO I have to use 3rd party installers like Nullsoft or InstallShield ?
Yes, Unity doesn't do this for you.
If you want a Windows installer - as you guessed - you have to use 3rd party installer-maker software to package your exe and folders up into a standalone installer.
There's a complete list of free and paid-for installers at http://en.wikipedia.org/wiki/List_of_installation_software
i use innosetup. it takes a few minutes to create the setup file and almost every aspect of the setup is customisable.
I repacked NFS HP2 using ActualInstaller in just 10 minutes.