If save scumming counts as cheating, then yes. But otherwise, I’ve only ever used cheats in single player games and I really only use cheats if either the game sucks or the cheats I used didn’t effect gameplay. Some of the times I remember using cheats are:
Using the “fixme” command in Morrowind because I got stuck somewhere.
Using various cheats in the GTA games, after I had already beaten the main story, just so I can cause some mayhem.
Using the “giveall” command in Doom because I installed a weapon mod that required it.
Using the free cam that built into some emulators.
I used to use save states in old video games that didn’t have saving systems but I don’t do this anymore. I just only play them until I get to a point I can’t progress.
I think I remember using a cheat code to access unused content in at least one game, but I can’t remember what game that was.
While I haven’t played it yet, there is a PS2 (I think) game that requires using a cheat code to enable widescreen (or was it 720i, or maybe there was more than one game that did this, I can’t actually remember now).



While I’m not sure how much of a difference the CPU and RAM will cause, my current laptop has the same GPU, so I should have a general idea of what games will work on your laptop.
Since you mentioned RuneScape, I do actually have RuneLite (a third party client for OSRS) on this computer and it does run fine. I haven’t tested it yet but I’m pretty RuneScape (RS3) should also work well. The last time I ran RuneScape on Linux was when I had a computer with an Intel HD Graphics 3000 and I was able to get an almost playable frame rate at my usual graphical settings, so I’m curious about how well it’ll run on my current computer, but I currently don’t have any interest in playing RuneScape at the moment.
As for other games, if you’re interested in games similar to quake, I’m not really a fan of these types of games but I know that World of Padman worked pretty well when playing offline, so I don’t see why it wouldn’t work well on your computer. It might seem like a weird choice at first but the levels are quite large and detailed, and the music is also pretty good as well. It started as a mod for Quake 3 before it became it’s own standalone game. This can either be downloaded from their website or from Flathub.
Another game I know of is called Urban Terror. Similar to World of Padman, it also derived from Quake 3 but it looks and plays more like Counter Strike (or at least what I think CS plays like). I personally didn’t care for this one as much but some people might like it more than WoP. This can be downloaded from either their website or from Flathub.