This [will be] a definitive checklist to achieving 100% in Grand Theft Auto IV: The Lost and Damned. I [will eventually] personally confirmed all of these tasks. Feel free to reply if you think something is inaccurate. There are gameplay spoilers in this thread!

Good luck!

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100% Completion Checklist
_{(last updated February 28 2009)}

Missions (X%):

• Complete all 23 story missions and reach the game's credits (X%).

Activities (5%)

• Win in a game of airhockey (1.25%).
  
• Win in a game of darts (1.25%).
  
• Win in a game of pool (1.25%).
  
• Win in a game of arm wrestling (1.25%).

Collectables (X%):

• Kill all 50 seagulls scattered around the city (X%).
  
• Steal all bikes requested by Angus (X%).

Friends (5%):

• Go out with Clay or Terry, carrying out every option listed below at least once with at least one of the two (5%).
  • Air Hockey
    
  • Darts
    
  • Drinking
    
  • Eating
    
  • Hang Out
    
  • Pool
    
  • Show
    
  • Strip Club

Random Characters (X%):

• Complete all tasks given by random characters met in the street (X%).
  • #1
    
  • #2
    
  • #3

Side Missions (X%)

• Complete 25 gang wars (X%).
  
• Set a time in all 12 bike races by finishing in first place (X%).
  
• Complete all jobs for Stubbs (X%).

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Rewards
_{(last updated February 20 2009)}

Gang Wars:

Spoiler: Reward for completing 10 Gang Wars
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Sawed off shotgun
A sawed off shotgun will spawn at The Lost's Clubhouse.


Spoiler: Reward for completing 20 Gang Wars
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Automatic 9mm
An automatic 9mm pistol will spawn at The Lost's Clubhouse.

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Xbox 360 Achievements

Unlocked whilst pursuing 100% completion (130 Gamerpoints):

• Easy Rider (100G): Finish the story.
  
• One Percenter (5G): Help Billy get his bike back.
  
• The Lost Boy (25G): Become leader of The Lost.

Also available to unlock (120 Gamerpoints):

• Full Chat (70G): Build Terry and Clay's toughness to 100%.
  
• Get Good Wood (50G): In the bike races, whack off 69 bikers with a bat.

[color=#666666]This message was edited by Xenctuary on Feb 28 2009.

You only have to complete 12 bike races.

Thanks for the information, I've updated the list.

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Get Good Wood (50G): In the bike races, whack off 69 bikers.

What a difference omitting three words makes.

quote

Get Good Wood (50G): whack off 69 bikers.

Or seven even.

You only unlock weapons from gang wars till your 50th, after that at about 55 the money maxes out, and you no longer get weapons delivered to your safe house.

i havent even bothered downloading this i have the points and that but i cba. is it worth it?

(talking about rewards for gangwars) its the weapons will appear in the clubhouse, well what if you have beaten the game, thereforth there is no clubhouse