I know its a bit late to ask but what do you mean by NFT? like an actual one you can buy with crypto or do you mean something like steam cards, when you play a game in steam sometimes you get cards for doing stuff. Or do you mean collectibles you can get in the game and is it mandatory if its the crypto one, thanks (edit: also i am using unity c#)

it could be something like steam cards for sure. For each achievement unlocked. As example, players could receive a free NFT minted on the Unique Network Testnet with free tokens (named Opal).

If dealing with this is too complex, you can add the achievements or other NFT-like elements in the game (collectables, characters, etc), but not the actual blockchain stuff and we'll help with the integration, even after the game jam ends (if the game is good enough) to make the game qualified for the prize.