A Title Pack is a set of elements "combined" together to create a new experience. By using a Title Pack, you will have access to several dedicated tools to really customize the environment. With it you can use the following features:
Create a title pack offers also several features which are very helpful to control the experience:
Here is few examples of Title Packs:
TrackMania RPG:
CardMelee:
As you can understand now, a Title Pack can be equivalent to a little game when you use all the features (use of the item, new art design, use of the bots, creation of weapons), it can be totally different to ShootMania (a bit less for TrackMania for the moment as it has less possibilities than ShootMania).