Do you play one game at a time or multiple at once

i do a rotation of about 4 since i stream,enough to have a variety but enough also to keep interested

I play different games at once, well atm I'm playing two games

It depends on the game type.

If it's something like Call of Duty then I tend to stick with it until I have finished the story then I go through it again picking up missed achievements.

If it's something like a platform type game, I will switch between games.

several at once especially when some have special events, although I like to focus more on a until you finish it and leave it

I usually play 3 to 4 games at a time, alternating between campaign and multiplayer ..