Easy experience points
To gain extra experience from battles, make sure to get out of the Mako for the final hit. You can weaken the stronger enemies from inside the Mako and then get out to finish them off. You will only get 60% of the experience if you kill enemies with the Mako.

Easy Mako repairs
If your Mako is badly damaged and you do not want to or cannot spend Omni-gel to repair it, save your game, and reload it. Your Mako should now be totally repaired.

Weapon that does not overheat
Get a HMWA X assault rifle with Frictionless Materials, Combat Optics X, and Snowblind Rounds X as upgrades.

Saving weapon points
If you are a Soldier, level up weapons so you can use their bonuses and no further. For example, carnage is the shotgun's bonus. By doing this, you will have extra points for a desired weapon and points to level everything else completely out. You do not need the damage and accuracy bonus from the points because when you become a Spectre the best of every weapon becomes unlocked in the Normandy or at the C-SEC requisitions office.

Lethal sniping
Equip any good sniper rifle (powerful and accurate) with High Explosive Rounds (highest level preferably). This combination will kill nearly every normal enemy it directly hits, and severely damage enemies in their proximity, if not killing them as well. For fun, if you shoot at the enemy's feet or the ground he is standing directly on top of, he will jettison into the air. Note: High Explosive Rounds work best only with sniper rifles as they are meant to kill with one shot. If it is used with a pistol, assault rifle, or shotgun, the weapon will overheat in less than five shots (depending on the type of weapon), regardless of upgrades and decency of the gun. This will make yourself vulnerable to enemies.

Recommended weapon upgrades
The best weapon upgrades on any gun are Frictionless Materials X (28% heat damping, +7% damage), Kinetic Coil X (28% weapon stability, +7% damage), and Slegdehammer Rounds X (50% weapons force, + 60% poison damage, - 20 heat damping). Overall, the weapons stats you will end up with are 14% damage, +28 weapon stability, +50% weapon force, +60 poison, +8% heat damping. The poison damage also prevents shield regeneration. Also, any of the following combo of any grade is the best.

N7 Gamerpic
Successfully complete the game on the Insanity difficulty setting to unlock the N7 Gamerpic.

Saren Gamerpic
Successfully complete the game on the Hardcore difficulty setting to unlock the Saren Gamerpic.

Character classes

Adepts

Adepts are biotic specialists. Starting out equipped with pistols and light armor, the true strength of the adept is through the upgradeable implants that give them their biotic powers. These powers can be used to lift or throw objects, shield the party, and disable or destroy enemies.

Engineers

Engineers are tech specialists. Using the holographic OmniTool, they can decrypt security systems, repair and/or modify technical equipment, disrupt enemy weapons or shields, and heal their party. Even though they begin the game with only pistols and the OmniTool, engineers can unlock the ability to wear light armor and reverse engineer enemy technology. They can also learn to put up protective shields and heal the party.

Infiltrators

Infiltrators combine combat and tech abilities, and specialize in killing or disabling enemies at long range. Infiltrators are trained to use OmniTools, but the focus is on decryption and offensive abilities rather than healing. They can train with pistols or sniper rifles, and can learn to wear medium armor.

Sentinels

Sentinels combine biotic and tech abilities. Typically they use biotic abilities and advanced healing skills to defend allies, though they can also disrupt opponents with biotic or Tech attacks. They are more efficient at tech and biotics than other classes, but at the expense of combat. Sentinels can only use light armor, and receive no advanced weapon training.

Soldiers

Soldiers are combat specialists ideal for the front lines of a firefight. Soldiers begin the game trained with skills in both pistols and assault rifles, they have improved health and the ability to wear medium combat armor. As you progress through the game, you can unlock assault training, skills with shotguns and sniper rifles, become able to perform first aid on yourself and party members, and wear heavy combat armor.

Vanguards

Vanguards are biotic warriors. They combine offensive biotic abilities and weapons training to quickly take down opponents, and are especially deadly at short range. They can train with pistols and shotguns, and can learn to wear medium armor.

Recommended career
Play as a War Hero Soldier first. By doing this, during your second play through you will have all of the money, weapons, and armor to use for the other careers.

Ensuring experience points and gamerpoints
After a major plot has been played, make sure to talk to your crew. This will give you experience points for clues and boost your crew's morale. There is also a subplot for romance where you must choose who you want to have a relation with. You may lose the gamerpoints if you do not talk to the crew.

Avoiding lagging game play
Every once in a while you may encounter a slow down on graphics and game play. If you have been playing for less than three hours and see the "Loading" text, release your controller for faster loads. If you have been playing for over three hours and the game play slows down, save and reboot your Xbox 360. This happens because the Xbox 360 does not have an efficient way of clearing its memory for new information. Once the memory is saturated, the "lagging" game play happens. Because Mass Effect is so massive and everything is unique, it uses all of the available memory.

Mako controls
Press RB: Fire rockets.

Press RT: Fire main gun.

Press A: Undercarriage Rockets. This is useful for getting "unstuck", setting the Mako upright if upside down, and stabilizing from falling off a mountain.

Press X: Return to the Nomandy.

Press B: Exit Mako for on-foot exploration.

Hold LT: First person view.

Click Right Analog-stick while pressing LT: Zoom. Click it again for additional zoom. Click it again to exit zoom.

Puzzle solution in Noveria
On the planet Noveria, you must solve a puzzle after you enter the Core at Mira to restore activity to the compound. The solution is as follows. There are three columns. Four discs are in the left column. You must move all four discs to column two or three for the puzzle to be completed. "1" indicates the upper most ring, "4" is the lowest, etc.

Step 1

Move 1 to the middle.
Move 2 to the right.
Move 1 to the right on top of 2.
Move 3 to the middle.
Step 2

Move 1 to the left.
Move 2 to the middle on top of 3.
Move 1 to the middle on top of 2.
Move 4 to the right.
Step 3

Move 1 to the right.
Move 2 to the left.
Move 1 to the left on top of 2.
Move 3 to the right on top of 4.
Step 4

Move 1 to the middle.
Move 2 to the right.
Move 1 to the right.
These steps will solve the puzzle with all four discs being in the right column.

Defeating the giant worm in Edolus
During the mission about the missing Marines, you will encounter a large worm creature. To defeat it, jump just before the projectile acid the worm spits, and attack it with missiles (RB) and constant gunfire (RT).

Defeating Thresher Maw in Edolus
The easiest way to defeat the Thresher Maw is after it has initially launched out of the ground to drive off, stay at a relative distance, and drive circles around it while firing. Because of your distance, it will not use its long-ranged attack or be able to cause melee damage. It will go back underground after a time or certain amount of damage is inflicted and will change the location it pops up. Repeat the circular attack to get away undamaged.

Defeating Saren (before resurrection)
Use your rifle and strafe to avoid his rocket fire. Alternately, use the following trick to defeat Sarren without fighting him the first time in the Citadel. If you have your Charm or Intimidation all the way up, use the new chat options. You will eventually make Sarren kill himself.

Defeating Saren (after resurrection)
Have your crew and yourself use biotic powers everytime Saren stops to shoot (usually when he is hanging on the wall). Only do it once when he stops, otherwise you will be wasting abilities.

Reversed Earth
Once you have landed on Luna, Earth's moon, look for the view of Earth. When you zoom in on Earth, noticed that its image is reversed. For example, Florida is where California should be and vice versa.

Easy ally achievements
Use the following trick to unlock all six ally achievements with only three playthroughs. When you start the game, focus on getting all six of your teammates. Choose two of them to play through the game with. Keep those two until you complete the majority of the game. You will get the ally achievement for the teammate you recruited first. After you get it, replace that teammate with another one as soon as possible. After the next assignment you complete, you will then unlock the ally achievement for the second teammate.

Achievements
Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Medal of Honor (100 points): Complete Mass Effect Playthrough on any setting.
Medal of Heroism (25 points): Complete Feros.
Distinguished Service Medal (25 points): Complete Eden Prime.
Council Legion of Merit (25 points): Complete Virmire.
Honorarium of Corporate Service (25 points): Complete Noveria.
Long Service Medal (25 points): Complete 2 Mass Effects on any setting.
Pistol Expert (10 points): Register 150 Pistol Kills.
Shotgun Expert (15 points): Register 150 Shotgun Kills.
Assault Rifle Expert (15 points): Register 150 Assault Rifle Kills.
Sniper Expert (15 points): Register 150 Sniper Rifle Kills.
Lift Mastery (15 points): Use biotic Lift 75 times.
Throw Mastery (15 points): Use biotic Throw 75 times.
Warp Mastery (15 points): Use biotic Warp 75 times.
Singularity Mastery (15 points): Use biotic Singularity 75 times.
Barrier Mastery (15 points): Use biotic Barrier 75 times.
Stasis Mastery (15 points): Use biotic Stasis 75 times.
Damping Specialist (15 points): Use Damping Field 75 times.
AI Hacking Specialist (15 points): Use AI Hacking 75 times.
Overlord Specialist (15 points): Use Shield Overload 75 times.
Sabotage Specialist (15 points): Use Sabotage 75 times.
First Aid Specialist (15 points): Use medi-gel 150 times.
Neural Shock Specialist (15 points): Use Neural Shock 75 times.
Completionist (25 points): Complete the majority of the game.
Medal of Exploration (50 points): Land on an uncharted world.
Rich (25 points): Exceed 1,000,000 Credits.
Dog of War (25 points): Register 150 organic enemy kills.
Geth Hunter (25 points): Register 250 Synthetic enemy kills.
Power Gamer (20 points): Reach 50th level with one character.
Extreme Power Gamer (50 points): Reach 60th level with one character.
Renegade (15 points): Accumulate 75% of total Renegade points.
Paragon (15 points): Accumulate 75% of total Paragon points.
Paramour (10 points): Complete any romance subplot.
Colonial Savior (50 points): Complete the Bring Down the Sky mission.

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