For those of you who enjoy a bit of the grim and or dark, this weekend you can pick up:
Renegade Scout for two thirds of the price. 

https://www.wargamevault.com/browse.php?discount=9a21a1b6c0 

Renegade Scout is a complete "reconstruction" of the Rogue Trader and 2nd edition rules system, updated to be what an alternate future "3rd edition" might have looked like. It comes with its own built in setting (Unified Space) with tons of races and weapons, but is also playable using original 40K units. 

For players who prefer a bit more of a unit based approach, you can pick up Rogue Hammer at

https://www.wargamevault.com/browse.php?discount=9a225236cb 

This uses the Squad Hammer engine to create a Rogue Trader like experience, meaning units instead of single figures, easy combat and a great combined arms experience. The rules are being added to all the time and features points values and a number of refinements over the standard Squad Hammer system. It is also playable solo if you are so inclined.