Outrun
These arcade games had to draw you in immediately and Outrun was excellent.
@Mummelmann Half-Life has incredible opening levels, the issue I have with them is you can't jump into the action. It's basically a walking sim until you get a weapon. I was gonna say Halo as well, but you don't start on the island until after a long exposition.
Best first levels to me are where you jump straight into the action, which is rather rare nowadays.
Flower had an amazing opening level
Relaxing to boot up just for the first level.







