Descent taught me how to fly using the numpad. I think I had A as thrust, Z as reverse, 8/2 as pitch, 4/6 as yaw, 7/9 as roll, 1/3 as horizontal strafe, and +/- as vertical.

Descent also taught me how to use dial up for multiplayer.

1994 was 6 years ago, this doesn’t really qualify as being retro