FearLess Cheat Engine

I'm just really interested in the concept of "noclip" but I don't want to go through all these (singleplayer) video games myself trying to noclip every one of them (1 can't do it alone as there are tons of them) so if it's not against rules, I was wondering if anyone that knows of any "single-player" video games that you can "noclip" on could list them along with the "noclip" cheat itself below?

and although they are similar to each other, I'm not interested in the "free-fly cheat", you can, however (if it's not against any rules) also list them below.

I know doom (classic) has this feature. You can even use it on the console or just type IDCLIP for it to happen. I think it works on all doom wads really. Its really interesting.