I can't figure out how to open Mann Co crates in Team Fortress 2 game. Can someone please give me a clue? I realized that they require keys.... but where do I find the keys?
You can buy the key to open the Mann Co crates and get the supplies it contains on any site that trade items for TeamFortress 2. Just choose a reliable site where you can really buy what you need without cheating. For example, here is one of such sites, where I just recently bought the key necessary to open the crates https://tradeoffers.tf/orders/440/Mann Co. Supply Crate Key.
You can buy the key to open the Mann Co crates and get the supplies it contains on any site that trade items for TeamFortress 2. Just choose a reliable site where you can really buy what you need without cheating. For example, here is one of such sites, where I just recently bought the key necessary to open the crates https://tradeoffers.tf/orders/440/Mann Co. Supply Crate Key.