Design Your Own Mission
The LAPD Assault:

There are two versions of this, one which is editable
and another which is only for playing.

Summary:
Ok, bottom line is that you are in prison you try to
escape your way out aggressively, it is ceartainly
worth playing.

Note:
Oh and be sure to look out for a
cutscene that you may remember from Vice City!
It's about exactly the same thing here, (check it
out for yourself) except the actor maybe different
but the behavior is the same.:)