For me: Getting all North American launch titles for NES, Game Boy, Nintendo 64 and Game Boy Advance (the systems I own). I'm missing Clu Clu Land, Ice Climber, Stack-Up, Tennis, Wild Gunman, Wrecking Crew, Alleyway, Baseball, Super Mario Land, Tennis, Pilotwings 64, Super Mario 64, Super Mario Advance, F-Zero: Maximum Velocity, Army Men Advance, High Heat Baseball 2002, Tony Hawk Pro Skater, Dodge Ball Advance, Fire Pro Wrestling, Top Gear GT Championship, Tweety and the Magic Jewel, Fortress, Iridion 3D, Pitfall: The Mayan Adventure, Ready 2 Rumble Boxing: Round 2, ChuChu Rocket! and Rayman. I already have all 5 Super NES launch titles.