Hi,
I think this depends a bit on how you expect to get the output.
Do you want to see all tasks in an additional column? Then you could start with the following:
valueexpression={name}
listdelimiter=<br>
listmethod=nested(project.tasks).lists
valueformat=HTML
textmode=true
type=iterate
Unfortunately you will not be able to get clickable links for the task names here (Limitations of a collection View)
If you need all tasks in rows, I would go the other way round and create a task report.
Perhaps you can specify a bit more, what you want to get in your report.
Regards
Lars