Generally when I play ero games I want to fuck everything that's even a little attractive. I'll play loyal if the game seems to reward that (for example, in Melody you unlock a lot of content by being monogomous).
If a game has multiple love interests, I will make a save file for each one and stick to that character only. Then I will do a harem run as the last save.
It depends on what type of game it is if its a Harem one or one where there is no game over/bad outcome for cheating the I cheat all the way if it's a game where your supposed to choose a partner and be loyal to get to the end of the game then I create multiple saves and stay loyal to each possible li in each save
I only cheat if there is no open relationship since i refuse limits. But i prefer games with real harem or poly setting, especially since i cant stand the childish drama.
In games: harem is gold. Because I can have it there without consequences. IRL I'm loyal. My ex cheated on me and is was a horrible feeling. I never would do that to my partner. And I hope, she will never do that to me.
Always loyal to my main girl but will go harem if she is down for it. Not just in games. I apply this to rl. I do not fuck around but I let my girl know up front that my cock is the only cock but she can have all the pussy she wants. I don't even have to be around. BUT. I don't stick my dick in another girl without her approval. 1st wife must always be dom to the others for a harem to work. She can still sub to you but do not "castrate" her when it comes to the others. If you want a happy harem that is, lol
Desert Stalker is a good game to mirror this. I am not into big tits but the afore mentioned premise makes up for it
It depends on how the story is driven, but yet more of a harem, cheating is also ok but only in games. I have my own approach and if cheating would block a plot then I am not interested.