Since their introduction in 2013, Steam Trading Card sets have been integrated into over 7,000 games.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: Since their introduction in 2013, Steam Trading Card sets have been integrated into over 7,000 games. ### Response: .