4x RTS Games that let you pause (like Sins of Solar Empire)

[Artanis]

Stellaris. It also lets you pause the game and issue orders, and it's pretty fun, and has a long dev cycle of support to go, judging by other Paradox games.

Anything else by Paradox as well: Crusader Kings 2, Europa Universalis 4, Victoria 2, and Hearts of Iron 4 all work this way (though none of those are in space the way Stellaris is).