Homeworld tried something other titles either tried and failed to do, or did not even dare to attempt. Put you into a truly threedimensional space and have you fight RTS battles in it.
The controls were surprisingly simple and well thought out, and even more modern games still struggle to replicate this.
Instead of clumsily having the player move around and orient the camera view freely and produce undesirable results, the game anchors the vision around your ships, or other points of interest that you can select from the overview.
In the overview, you could easily move around your fleet even to far away areas with few simple commands, switch between view anchor points to gain a better overlook of the battlefield, and see your and enemy unit compositions at a glance thanks to a simple ship type overlay using symbols.
A simple to use and helpful formation control and unit behavior system helped turn the favor in heated combat situations, and watching your ships change formation mid combat to strike down the enemy looked plain beautiful. Add to that a great space opera story in single player and relatively well balanced gameplay and you had a true masterpiece at your hands.
Voting for this, knowing full well it is included in the HW-Remastered edition, because I would like to see this as stand alone on GoG to make sure it does not get lost.
If there is any thing I would like to see done to this game, in the sense of "fixing" it, it would be making it compatible to modern resolutions, or at least have it work on 16:9 screens without having to mess around in the registry