Also, the game play intensity is acceptable for someone who work long hours and come back home and launch computer to relax.
Do you mind elaborating? E.g. examples of games with play intensity that is not acceptable, or how you have gone out of your way to make it acceptable?
I always thought most games are acceptable for the working class. All the major titles allow the players to jump in and play whenever they have time, and allow them to play as much or as little as they want during each session.
There is one type of game that are quite unsuitable: Those that forces you to log in everyday to spend "turns/energy".
The problem with those games is that you can't be casual. You're forced to commit to logging in everyday for 10-30 minutes to spend your turns. When was the last time we manage to commit to anything (exercise, practice, housework etc) with such regularity?
Also, people who work long hours tend to need rest/sleep, time with family, or simply have no time during the weekdays after work. They might have a few hours during the weekend to play some games but then they'll feel bad losing a week of turns (usually only allowed to store 1-2 days worth of turns). After 10-30 minutes of playing, they can't continue playing anymore, so they have to find other games.
IMHO unless they allow players to store 3 weeks worth of turns (offices often go into "crunch time" where you have to work non-stop for weeks without much breaks), people with long working hours will not be able to play the game properly, or even catch up to their peers who managed to play everyday.