Mass Effect Cheats

Downloadable Content Achievements
Colonial Savior (50): Complete the Bring Down the Sky mission.

Multiple unlocks
Complete the game on Normal to unlock the secrets:

Hardcore Mode: Complete the game once
Increased Level Cap (51 - 60): Complete the game once
New Game +: Start a New Game, then select to use existing Career. You'll be playing with your older character (with all items and skills intact).

Infinite Paragon + Achievement
When you reach the Hercules System in the Attican Beta Cluster you will receive a mission to recover a "lost data pad" from the planet Eletania. Once you have found the data pad on one of the roaming local species(called a "monkey" in the game) in the mine you will be awarded approximatly 6+ paragon, save the game immediately. Once done, load the saved game and you should be able to continue to click on this monkey infinite amounts of times... I ran up my Paragon to 450+ points and, of course, received the achievement.

Infinite Renegade/Paragon
On the planet Noveria, head to the hotel bar and look for a Turian named Lorik Quinn. Accept his quest to steal the data from his office. Once you get the data, the receptionist will ask you to get Quinn to testify. Tell her you'll do it, and then go talk to Quinn. From here:

1) Tell Quinn that he should testify (top left option).
2) When he refuses, select the Charm option (top left) for Paragon points or the Intimidate (bottom left) for Renegade points and end the conversation.
3) Talk to him again, and ask about the Matriarch.
4) When he gets done talking about her, select the "Other questions" option (bottom right).
5) Now, you'll have the option to ask him to testify again (top left). He'll refuse, and you'll be able to use the Charm or Intimidate option again to gain another 24 Paragon or Renegade points.

Repeat steps 3-5 until you have all the Paragon or Renegade points you want.

Unlock Gamer Pics
Completing the game on the Hardcore and Insanity difficulties will unlock 2 special gamer pics for use on your profile.

"N7" Gamer Pic: Gain the Medal of Valor achievement
Saren Gamer Pic: Gain the Distinguished Combat Medal achievement

Class Endgame Bonus Talents
Beating the game with a specific class will allow you to give newly created characters one bonus talent.

Adept: Singularity
Infiltrator: Sniper Rifle
Vanguard: Shotgun

Infinite Credits
Here's a great way to score infinite Credits. Follow the steps below in order to do so...

1) First, fulfill the side quest involving Dr. Michel (from the Med Clinic) and her blackmailer. After the quest is complete, you'll get a discount from all of the goods she sells.
2) Start selling her all of your expensive equipment. Then, travel to the Wards Markets and talk to the merchant named Expat. You can buy all of your stuff back for cheaper than you sold it off.
3) Head back to Dr. Michel and sell off your stuff again. Repeat this process as much as you want for as much profit as you desire.

Infinite Experience
Head to the freighter on Feros (in the Zhu's Hope Colony). You'll find a computer terminal here that, when decrypted, will alert you to investigate supply shipments that have diverted course in the Voyager Cluster.

Quite simply, if you then save your game, and subsequently reload it, you'll be able to decrypt the computer again for the same information you just got. This is a slow, slow process, but it is a real way to have access to infinite experience points. If you have the patience to do it, give it a go.

Game Completion Duplication
After completing the game, you're able to restart with your character equipped with everything he had in the prior mission, as well as retaining experience, credits and more. However, there's a strange duplication anomaly present that is worth mentioning. If you take a look at your inventory, you'll notice that there are copies of what you're wearing (armor, weapons, modifications) in your inventory and equipped on you. Nifty!

Thresher Maw Tactics
Thresher Maws, which are located mostly on uninhabited or barely-inhabited planets, can be pesky foes. The best way to take care of them, as most people know, is to circle their locations as you pound them with machinegun fire and rockets from the Mako. However, Thresher Maws disappear underground and reappear near your location, and can at times reappear underneath you, instantly killing you (or leaving you dangerously close to death).

A great way to avoid this is to drive the Mako over elevated terrain as you fight these foes. Thresher Maws can only burrow underneath flat terrain, so elevated terrain is off limits to them. If you remain on elevated terrain as you fight them, they won't be able to respond to your attacks with attacks of their own.

Infinite Experience II
During your first conversation with Liara, you gain experience when you’re done speaking with her. If you reload your save after the conversation, you can actually speak to her again and get that experience one more time, over and over again. Depending on where you are in the game, this conversation is worth about a thousand experience points, so it’s quite a lucrative conversation to partake in over and over again.