The Sims 3
50 Achievements
1,000
30-35h
Working Friends
Became best friends with your boss and all of your co-workers.
30
How to unlock the Working Friends achievement in The Sims 3 - Definitive Guide
The way I got this was to enter the music career, once I had started the career I only had one co-worker to become best friends with and then my boss.
Becoming best friends with your co-worker and your boss is not much of a chore. If you want to get the achievement for getting level 5 in a career, you might aswell do it now since every time you go to work. You can choose to chill with musicians (After meeting them) which improves your relationship with them, you will also get opportunities during your career which will improve your relationship with your boss.(And also go towards the achievement for completing 10 opportunities).
However the quickest way is to just invite your co-worker or boss to your home and keep on doing nice interactions with them. After you have become best friends with your co-worker and your boss the achievement will unlock.
In every job there is 1 boss and one co-worker. In this case, my co-worker was my partner. Once I had started work, I used the drop down list on the left hand side, (that indicates what kind of day you will have), and I picked "Chat with co-worker". This built up my relationship with the co-worker pretty quickly.
I also made sure I invited them round every so often to chat and this helped too.
If you get any opportunities from work, they help to build you relationship with your boss too!
Good Luck :)
It's not hard, find out who they are invite them over all the time etc etc... Like I said that I think it's glitched I was best friends with all my co-workers with various sims before I ever got this one.
To become best friends with your boss and co-workers you're first going to have to find out who they are. Since you don't actually see your sim during work the only way to see who your co-workers are is by pressing and going to the relationships tab. From there push until you get to the work portion of the relationships tab. Now that you know how many people there are and who they actually are you can invite them over to your house so that you can talk to them.
You can invite them over to your house, throw a party and invite them or talk to them over the computer. Do anything that will help you two interact and become friends. Use friendly conversation options and play to your social advantages. If you're a funny then tell more jokes for example. Continue talking to these people until the game tells you that you're best friends. Once you're best friends with one of them move onto the next one. Be careful though because if you don't talk to a person in a while you can lose their friendship. Get to the best friend relationship status with all of your co-workers and you'll unlock the trophy.
You can check the people you work with by going to your friends tab and then filtering to the work tab. The easiest career I found to do this was the business career because you can get this achievement while your at work. While at work press than press and a menu will come up showing all the options you can do while at work. Choose to meet co-workers and after you have met them pick either "Suck up to boss" or "Chat at water cooler" and after a while you will become best friends with your boss and co-workers. At other work places there is also an option to socialize while you are working.