Earning money from playing crypto game

I have a question, there is currently a mobile battle Royale game, Blast Royale, where if you kill a player they have a chance to drop 1 $NOOB token (it is used to buy cosmetics ingame), then later in the month. You are airdropped all these tokens you gathered to your crypto wallet and can sell them. Is this permissible? @Mufti_Faraz_Adam @Mufti_Billal