- Estimated Achievement Difficulty: 6/10
- Offline: 79 (1750

- Online: 1 (10

- Amount of Time to 1750

- Minimum Number of Playthroughs Needed: 2
- Number of Missable Achievements: None
- Do Cheatcodes Disable Achievements? None
- Does Difficulty Effect Achievements? No
- Glitched Achievements: None
- Extra equipment needed? None
*Many of the Co-op achievements in Borderlands can be done either online with a friend, or by local Splitscreen and System-Link
Introduction
Welcome to Borderlands! This game has a total of 50 achievements and will require two playthroughs to get the 1000

There have been reports that Made in Fyrestone and Made in New Haven have not been unlocking for some people. Some have reported that it unlocked half-way through their second playthrough, while others haven't unlocked it at all. Thankfully, a patch has been released to counter these problems, so no one should have any trouble unlocking achievements.
Playthrough #1
Going through the game on your first try should have you get to know Pandora better. Playing through the story, you should unlock all the Discovering Locations achievements, while unlocking the Boss achievements as well. As you continue playing, grabbing each type of weapon, use them all to kill enemies for each weapon-type kill achievements. Grab and sell enough loot to contribute to the Fence and Pandora-dog Millionaire achievements. When you complete your first playthrough, you should be in the level 30-40 range.
After completing the game for the first time, you can select a new game and select your previous higher level character. Keep in mind that all the enemies will be around your level, and will be much harder this time around. Use this playthrough to help level you up to level 50.
Co-op Playthrough
There are many achievements in Borderlands that include co-op. These can be done either online with friends, or splitscreen/system link. Compete in Arenas and defeating a Boss with a partner will net achievements. Completing 15 with a partner will also net you an achievement, as will healing a teammate who has been downed. If you start up your first duel, and beat the person with taking any damage, will net you both the Duel-icious and Duelinator achievements.
Note: that if you have a high level partner, you can join his game to get you to level 5 really fast, and unlock the achievements for using each character's skill.

To start this content pack you must go to a fast travel station and travel to ‘Jacobs Cove’, once you arrive you’ll soon find all is not well and Dr. Ned (Who is in no way whatsoever related to Dr. Zed…) has been conducting some kooky experiments and has turned the town into a zombie horde.
The achievements are simple and straightforward and four out of five of them are gained through playing the story line. The main story is fairly short which can be completed in less than five hours, the only achievement which may take longer is Braaaaaaaaaaaaains!.This requires you to collect a total of 485 zombie brains and hand them over to your old friend from Fyrestone, T.K. Baha. It is best if you complete the first two main story quests and then head straight over to his house and start your first collection mission, in doing so you should gather all the brains about the same time as finishing the main story.

This content pack can be accessed at any time by using a fast travel station and going to the ‘Underdome’. You’ll meet Moxxi again who is in search of a new husband and is hosting coliseum style battles to try and find a suitable candidate.
Once you arrive at the Underdome, head right over to the bounty board and accept the first mission which is entitled ‘Prove Yourself’. To gain the next four achievements you will need to survive 20 rounds in each of the arenas, and will be awarded an achievement for each individual arena once complete, as well as an achievement for completing them all. This proves to be a little lengthy and tiresome for some people so take a look at these threads Here and Here for two ways you can make the time significantly shorter.

To start playing this content pack you just need to travel to ‘T-Bone Junction’ from any fast travel station, which you can do at any part in the original games story and at any level. This is one of the longer content packs with a nice, varied batch of achievements which require you to progress through the story as well as complete a few other tasks. However, this pack has two glitchy achievements which are Depot Demolition and Completionist.
The quickest way to gather all of the achievements is to finish the main missions, which will net you a majority of the gamerscore and then go to all of the quest-giving NPC’s and finish all the quests they give you. There are also a few achievements which you may not unlock, if this is the case just search them in the achievement guide.
*Glitchy Achievements*
Depot Demolition is awarded when you complete the last quest in the story and blow up the secret armory, to avoid having this achievement glitch you should ideally do the whole last quest without stopping. Once you descend in the lift to start looting the armory you must not turn off your game, this will cause the game to glitch and make the achievement unachievable on your playthrough. You also need to know that the achievement will unlock after you have watched all of the credits, quitting out whilst the credits are rolling will also render the achievement unachievable.
The Completionist achievement is unlocked when you finish all of the quests in this content pack. This may seem straightforward, but a glitch can occur causing a set of doors not to open meaning you are unable to progress any further thus not completing a certain quest. To avoid this you must not have any two of these quests in your quest log at one time (Armory Assault, Super Marcus Sweep, and It’s Like Christmas.) Having one in your log is fine, just not two.

After a single Claptrap has breached its programmed boundaries, it develops a mind of its own and starts nothing other than a Claptrap revolution. Hyperion have asked for your help and you must hunt down and kill the Interplanatary Ninja Assassin Claptrap.
First off you will need to travel to ‘Tartarus Station’ to start this content packs questline. You can go there on any playthrough and at any level. I would suggest speaking to Tannis as soon as possible and start her impossible quests, see The Collector for more information. You should unlock that achievement approximately the same time as the Muerte la robo-lución achievement. Last up is the collectible achievements. You should aim to get Tourist. First off, see the thread Here for an easy way to get the achievements for collecting oil cans, bobble heads, pink panties, goldfish, 3D glasses and pizza slices.
All in all, Borderlands is not a hard game to complete. The only achievements that will require work is working your way to level 50, finding all claptraps, and completing all missions. For a complete list of claptraps, check HERE. For a list of missions for both Fyrestone and New Haven, check HERE. As far as the Borderlands downloadable content packages are concerned, whether you buy them all or just one, it really doesn’t matter. If by chance you are missing any achievements then fear not, you can return to the game at any time and gain any achievements at any time. Have fun out there in Pandora!