This can be done on any difficulty setting so I'll suggest doing this on Rookie with 8-10 minute quarters to be on the safe side. And while you're doing this, go right ahead and score 100 for that Stilt 100 (100 with a solo player), Sprite's Dynamic 10 (10 solo dunks), 1992 Game 1 (six 3 pointers with a single player), Come Fly with Me, Downtown Rookie, Double Double and Magical (triple double) achievement also. Kobe can get this easy with assists and rebounds. This one game can net you around 7-8 achievements.