Essential Xbox Game List

i cant give you the best list but here are some that you should really play

1. Halo/Halo2
2. Half-Life2
3. Doom 3
4. Fable
5. Dreamfall (only if you like games with deep storylines)
6. Jade Empire
7. KOTOR1 &2
8. Riddick

Ninja Gaiden, Psychonaugts, Metal Gear Solid 2:Substance, Jet Set Radio Future .. thats all I can think of (that has not been mentioned already).

Essential XBox playbook?  Can't fit 10 games on that one.  I'll give you an essential list, you can decide for yourself.

FPS

Halo
Doom 3
Red Faction 2
TimeSplitters: Future Perfect
Jedi Knight 2: Jedi Outcast
Soldier of Fortune 2
Deus Ex: Invisible War
Unreal Championship (1)
Project: Snowblind

Sports

NHL Hitz Pro
DeathRow

Action/Adventure

Ninja Gaiden Black
Brute Force
Scarface: The World is Yours
Mercenaries: Playground of Destruction
Otogi: Myth of Demons
Otogi 2: Immortal Warriors
Splinter Cell
Hitman
Ghost Recon (avoid Advanced Warfighter, though)
The Punisher
The Suffering
Armed and Dangerous

Fighting

Street Fighter Anniversary Collection
Capcom Vs. SNK 2 EO
Dead Or Alive Ultimate
Soul Calibur 2

RPG

The Elder Scrolls III: Morrowind Game of the Year Edition
Star Wars: Knights of the Old Republic (1 only)
Baldur's Gate: Dark Alliance
The Bard's Tale

Racing

Forza Motorsport

Strategy/Sim

Kingdom Under Fire

Other

Taito Legends
Capcom C-l-a-s-s-ics
Midway Arcade C-l-a-s-s-ics (1 and 2 only)

morrowind,

halo series,

forza,

DOA 3,

Def Jam: Fight for New York,

MVP Baseball 2005,

Doom 3,

Punisher,

Ninja Gaiden,

Marvel Ultimate Alliance or XMEN Legends 

1. Halo

2. Halo 2

3. Counter-Strike

4. Unreal Championship 2 The Liandri Conflict

5. Soul Caliber 2

6. Fable

7. Far Cry

is counter strike any good w/o xbox live? i am not connected online so is the single player campaing lengthy and worthwhile?Disappear_Here

In no order - 

• NFL 2k5
• Rainbow 6 3 (if you have live)
• Forza Motorsport
• Jade Empire
• Fable
• Knights of the Old Republic
• Halo series
• Psychonauts
• Ninja Gaiden
• Prince of Persia Series

Not my entire list, nor the obvious ones, but these are all must plays:

Freedom Fighters

Beyond Good and Evil

Burnout 3

Breakdown (... no really)

Rallisport Challenge 1 + 2

The Chronicles of Riddick: EFBB

Gladius (under the radar turn based strategy..good stuff)

Hitman 2

Jet Set Radio Future

Mechassault (only for the online stuff)

Ninja Gaiden: Black

Panzer Dragoon Orta

Tony Hawk 3

Mercenaries

All of these games are pretty frickin awesome for various reasons.

Did anyone mentioned GTA:San Andreas?lol, how can you miss a "real" great gameIAlreadyToldYou

Morrowind's bigger and the majority of everything that SA has is done really half-assed.  And the XBox version has terrible controls that you can't customise.  Need I say more?

in random order : 

- KOTOR

- Ninja Gaiden

- Fable

- Forza

- HALO/HALO2

- Conker

- Riddick

- Psychonauts

- PGR 2 

- Jade Empire 

Halo

Halo 2

Knights of the Old Republic

Splinter Cell: Chaos Theory

Fable

Max Payne

Republic Commando

Riddick

Splinter Cell: Double Agent

Splinter Cell

1. Ninja Gaiden

2. Oddworld: SW

3. Otogi

4. Otogi 2

5. Jade Empire 

6. Psychonauts

7.Kotor

8.Panzer Dragoon:O

9.Fable

10.Riddick

1)Ninja Gaiden Black

2)Fable the lost Chapters

3)Halo

4)Halo 2

5)Jade Empire

6)KOTOR 1

7)Forza motorsport

8 )Conker Live & Reloaded

9)Dead or Alive 3

10)Kingdom under Fire Heroes

Halo 1 & 2

Fable

Morrowind

KOTOR 1 + 2

Jedi Knight:Jedi Academy

Tony Hawk Pro Skater 4