Tablet - Go to Generator 2 and go into the little bunker and at the back wall with blue rocks will be four stone tablets and you can pick up one. Take that one tablet and go to the church and there will be a little pedestal of holy water which you can put it into. Once it is placed you have to get 20 melee kills next to it and a shield will be helpful for getting melee kills. Once it is done take it back to that same bunker and place it back on that table but do not touch any mud or you will have to redo the holy water step. Once it is placed back, get another 20 melee kills next to it and the G-Strike will spawn which you can pick up.