The Sims 3
50 Achievements
1,000
30-35h
Not Twice, But 10 Times
Completed 10 Opportunities.
20
How to unlock the Not Twice, But 10 Times achievement in The Sims 3 - Definitive Guide
Complete the opportunity and save the progress on a new save (Save 2). Load up Save 1 and re-complete the same opportunity and save again (on any save but Save 1). Each time the process is done, it adds to the challenge counter as long as the file is saved. Continue to do it over and over until the achievement unlocks.
The game's system works in such a manner that the challenges are tied to the profile and not the game save. So as long as the progress is "saved," the progress counter is raised. This works for other challenges and works for the wish counter too, so many other in-game challenges or achievements can be boosted in a similar manner.
The other way you will get opportunities is to just go to work, this is where you will encounter most opportunities. The criminal career offers a lot of these, I am at level 6 of this career and have already encountered 4 opportunities.
Hope this helps! :) (If any negative votes please explain in comments)
So another way to whore this is to try town events.
Opportunities come about from your work and the skills that you have. You will get a notification when an opportunity arises so don't worry about missing them. The opportunities can range anywhere from cooking a meal for someone's party to joining the amateur Olympics. Opportunities allow you to earn money, meet new people and advance in your career so you should definitely consider doing them as often as possible.
You can check your current opportunities by pushing and going over to the wishes and opportunities tab. There you will see that you can have one career opportunity, one skill opportunity and one special opportunity at one time. Once you complete 10 of these opportunities you will unlock this trophy.
You can receive opportunities by answering your Sim's cell phone, while working, while attending an event, and randomly. These do not last forever, so try and complete them as soon as you can. The amount of opportunities you have completed can be checked when you go to the Challenges page and checking the "Not Twice, But 10 Times" challenge. You can also check your current opportunities by going to your wishes tab and then pressing , then press to go to your current opportunities. Opportunities come around a lot, so no need to worry if you miss out on a couple.