Hero Reborn

Lina

Bravo, Girls!

Hero Returns

Dancing Revolver

Return of the Blue Wing of Death

Resume our Business

Samurai Showdown

Wolfwood

Desperado

Home Sweet Home

Darkness

Reservoir Dogs

Cement

No Escape

Emilio the Player

Long Goodbye

Families

His Life as a...

Countdown

Bluesy Killer Horn

Bottom of the Dark

Den of Thieves

Crying Wild Bullet

Those Who Stood Idly By

Doomed Sinner

The City, and Then the Banquet of Dogs

Breakout

Loss

Villain

Death Deal

Let Us Walk the Path to Redemption

The Gunslinger

Double Team

Cross X Assassins

Death Omen

Colorless Expression

Seeds Voyaging to the Stars, a World Inside a Pod

Happy Days.

Separate Ways

The King of Loneliness

Deadbeats n' Blues

A Late Arrival to the End of the World

Conflict

Invasion

Silent Ruin

Counter-Attack

Escape

A Fork in the Road

Wolfwood Spin-Off - Freed Bird

Hometown

A Violent Wind

Standing on the Verge of Death

Pandemonium

Invincible

Delusion

Sworn Friends

Resurgence

Finisher

Reunion

Last Farewell

Zero Hour

Slapstick Days

Thunderclap

Destruction of the Wicked One

Get Ready, Get Set...

Someone to Protect

The Journey Ends - But Heavy Breathing Still Echoes

Corrosive Thunder

The Interceptor

Resonance

Run Livio Run

Lantern

Their Own World

False Doppleganger

Double Duel

Demon Fire

Black

Battle of the Mystics

Tag in a Person

Catch as Catch Can

Apex Wings

VS (Part 1)

VS (Part 2)

When Conflict Comes to an End

Overkill

Side by Side

Never Give Up! Never Surrender!

Ticket to the Future

Mind Games

Double Wings

Never Ending Song

Much of the damage attributed to "Vash" is caused by the activities of bounty hunters who are after the 60,000,000,000$$ (sixty billion "double dollars") reward on Vash's head for the destruction of a city called July. Vash does not clearly remember the destruction of July, and only wants "love and peace", as he puts it; though he is a gunfighter of inhuman skill, he uses his weapons only to save lives wherever he can. 
As the series progresses, more is gradually learned about Vash's mysterious history and the history of the human civilization on Gunsmoke, the desert planet the series is set on. The series is often humorous in tone, but at the same time it involves very serious character development and especially in later episodes it becomes quite emotionally intense. Vash is occasionally joined by a priest, Nicholas D. Wolfwood, who is almost as good a gunfighter as Vash himself, and later is targeted by a band of assassins known as the Gung-Ho Guns for reasons which are mysterious at first. 
Trigun evolves into a very serious discussion of the nature of morality, posing questions such as: What is the nature of morality? Can we judge different moral codes? If a person is forced to betray their moral code, does that betrayal invalidate that moral code, and can the person still try to live up to that moral code? Can the person find redemption from their wrongs, and if so, how? 
(Source: Wikipedia) 

Originally serialized in 102 chapters, condensed then to 96 in the tankoubon release.
Vol.8 contains 2 extra chapters: “FREED BIRD”; Young King Ours 1999-09, 10.