Yeah but, if it's a game you can't play in singleplayer, using another tab to play it in singleplayer is kinda going to ruin the game, no? I mean you're literally playing the game in a different way than what was originally designed to be played.
Yes, but in most cases there are 0 players and there are in game locks preventing games from starting without others. It does allow seeing a little bit of how it's played, but having actual people is preferred to see the whole experience.
