Microsoft Azure CTO Mark Russinovich used a monster 420 logical processor virtual machine to play Tetris using the CPU core list in Windows Task Manager. The result is Russinovic playing Tetris via a Windows command prompt with the game’s output redirected by the CPU pixel array to the Task Manager, which is likely based on a modified version of the TaskManagerBitmap project. A video was posted to YouTube in July 2020 of this method being to allegedly play Doom via the Windows Task manager.
Source: https://www.bleepingcomputer.com/news/microsoft/monster-azure-vm-used-to-play-tetris-in-windows-task-manager/