A, B, and S-Rank weapons.

[PABLOparavida]

If I were to get an A or B-Rank and a God Shield thing would I get another chance to get S-Rank Weapon?

[MasterJoel]

yes... and it goes the other way too! if you got an srank, you can complete any stage over again to get the a rank, then b rank, then c rank. just remember that the a rank and below shields really suck. go for srank dude!