Single-player-only games? Sometimes (slightly more if you include something like no-clipping myself after getting stuck in the terrain or an object). Never in anything multiplayer.

I usually play with zero cheats on the easiest difficulty of something, at least for the first play-through. I’m generally more there for the story and some light involvement in things rather than being there for combat or something (even as someone who was in a few FPS tournaments back in the early 2000s).