First of all counter strike global offensive is an famous shooter which don't wish for f2p and is haves great strategy and focus on it (you dont aim sights and don't spam fire). it feuters great teamwork (sadly you need a mic for eusier wins) and
of corse the cases OMG THE KNIIIIFES!!! (1 LIKE=1 key and one case 100 LIKES=100 cases=1 KNIF).