ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Counter-Strike - Counter-Strike is a PC-exclusive FPS video game developed by Valve Corporation.
LightShot - The fastest way to take a customizable screenshot.
Quake - Quake is a series of first-person shooter video games released by id Software.