Achievement Thread - Guide on how to achieve them

Unlocked the Positive Potential badge. Had to bring the machine home and trigger all four results; I'd gotten three at Uni, but couldn't get the fourth because I kept getting other Sims wandering up and 'helping' while I was trying to balance the meter correctly. Just triggering the fourth at home didn't work, though, I had to then repeat the three I'd already gotten to get the badge. Used one sim to put each color up a third of the meter sequentially to trigger the fourth result.