For those that have Mass Effect 3, you will know that credits are the main goal of multiplayer, as they grant access to better characters and weapons. The best challenge for credits is obviously gold, as after every match you can afford a Spectre pack.
The problem is that most Mass Effect players have no idea how to complete the challenge. I am posting this to help those Mass Effect players.
Firstly, you'll need a good team, most prefferably of people you know and talk to. But that is not an absolute necessity.
The map you will need to choose is Firebase White, with the Geth as enemies. The area you need to hold up in is at the far back room of the map, the room next the brigde. This is the best area as all enemies funnel into 2 areas and nowhere else, so no enemies can sneak up on you.
The team needs specific characters to succeed. You will need: An infiltrator- preferably Salarian, this is for the Active cloak ability for weapon damage and the money waves involving deactivating devices.
A Salarian engineer: The decoy will be your main weapon, all enemies are drawn toward the decoy, making them easy targets to hit. And with the energy drain that restores shields, you will have a hard time dying.
A Justicar adept: The biotic bubble will be a fantastic addition to helping you hack those pesky terminals on the money waves. The biotic abilities are also very useful.
A soldier: This will be your main enemy killer, not using many powers but instead focusing on guns. The real brute force of the team.
I must also point out that the characters must be level 18+ due to enemy difficulty and powers.
Weapons are not actually too important, but there are preffered weapons. The best weapons for use are:
The Widow or Black Widow( prefferably level 3 or above)
A powerful pistol, like the carnifex.
These are the basics for completing a Gold, made from personal experience. As you play Gold you will make small adaptions to suit your play style, but the original formula will stay pretty much the same.
Happy hunting and keep the credits rolling!