Rocksmith

This might sound hard, but it really is not. There are plenty of songs you can easily obtain 100,000 points on without being really good at guitar. My suggestion would be either 'Angela' or 'Song 2', both of these songs have a really simple riff that continues throughout the entire song. You can not obtain 100,000 points on your first try. First you will need to level up the different sections of the song. You can do this either by playing the song multiple times or from the main menu: Songs > Angela/Song2 > Riff repeater > Leveler and level up the sections as good as you can.

When you have leveled up the song as good as you can and preferably «mastered» the song (level every section up to 100%), you can play the full song and 100,000 shouldn't be too hard.