Crota's End is a strike with checkpoints From the Grimoire - [quote]Some evils you cannot fight alone. Join with other brave Guardians to quest deep into the heart of Darkness and confront threats beyond imagination. Steel yourself. You will be tested to the very edge of your strength.[/quote] Edit - reading is difficult for people on these forums. The Grimoire clearly states that raids are not a solo activity. The entire Crota's End strike can be soloed with little effort in a short amount of time. It is not a raid.