There was a game available for purchase in the Steam online store that put a heavy load on the computer because it mined cyber currency. It was an Abstractism game. The developers were selling the game for just 49 cents (roughly 10 crowns), but in reality the game was abusing players' computers to mine cryptocurrencies. Valve removed the game and banned the game's developer from Steam. The game contained a script to mine cyber currency. However, it is not yet clear how many users actually played the game, but the Czech National Security Team CSIRT.CZ recommends that players remove the title from their computers for security reasons.
What kind? I don't have adblock with me
I don't know about you, but the game was definitely not made by Valve :D