CyClones
Press Keyboard right side: Alt+Enter keys to switch to full screen game play, and Alt+Enter keys to return.
How to play CyClones
Each game uses different controls, most DOS games use the keyboard arrows. Some will use the mouse.
CyClones Description
CyClones is a 1994 first-person shooter video game developed by Raven Software and published by Strategic Simulations, Inc. It has been called a "Doom clone"; however, unlike that game, it features a moveable aiming reticle, and allows players to look up and down, and to jump.