City builders, transport games, and factory games are basically "System Design" work already - you could probably disguise a CPU or circuit board design problem as an OpenTTD or Prison Architect or Shapez scenario, and get gamers to design boards for you.
Depends on what you're talking about, and context.
Physical games? Definitely the relevant physical strengths if done at a semi-professional enough level, so muscles etc. Team games often also teach you some coordination, leading and organization skills.
For board games, planning, adaptation, even critical thinking. Social interaction skills maybe, too.