Brawl (pre-David, often gets the comment, "They sound kinda like Pantera."):

Protest
Circles
Confusion
This Pain

The Sickness:

Voices
The Game
Stupify
DWTS
Violence Fetish
Fear
Numb
Want
Shout 2000
Droppin' Plates
M.O.L

Dracula 2000 OST:

A Welcome Burden

Valentine OST:

God of the Mind

WWF Forceable Entry:

Glass Shatters

Believe:

Prayer
Liberate
Awaken
Believe
Remember
Intoxication
Rise
Mistress
Breathe
Bound
Devour
Darkness

MAAW II:

Loading the Weapon (Instrumental)
Dehumanized
Fade to Black (Metallica Cover)

Stricken Pt. 2:

Hell

Ten Thousand Fists:

TTF
Just Stop
Guarded
Deify
Stricken
I'm Alive
Sons of Plunder
Overburdened
Decadence
Forgiven
LOC
Sacred Lie
Pain Redefined
Avarice
Monster
Two Worlds

Land of Confusion Single:

Sickened

Transformers OST:

This Moment

Inside the Fire Single:

Parasite

Indestructible:

Indestructible
Inside the Fire
Deceiver
The Night
Perfect Insanity
Haunted
Enough
The Curse
Torn
Criminal
Divide
Façade
Run (Limited Edition only)
Midlife Crisis (FNM cover on Special Edition)

This is a comprehensive list excluding live only covers (such as Whole Lotta Love, Cold Gin, and Black). Basically this is for those wondering if they have all of Disturbed's songs. And yes I used my iTunes to make this list because I'm anal and couldn't stand the list being disorganized haha. Also, it is arranged more or less chronologically.