The Supreme Ruler series is one of the best grand strategy games you can find on Steam.
I started out with Supreme Ruler 2020 and played the hell out of it before and even after the Gold version came to Steam. With Supreme Ruler 1936 you not only get a better optimezed engine that can handle even more units and events than the previous one, but you get a time period that is extremely interesting to play in the Grand strategy scenario.
While the game might not look like much (graphics wise), it makes up for it with its superb and in-depth gameplay. You are the ruler of a nation, you take all the important decisions and even command your troops into battle as you take the territory of your enemy bit by bit.
What I like about this game compared to other Grand Strategy games is that while it is hex based, the style in which your units or the enemy units capture a territory is shown in a more interactive way making it feel like your actions truly have a great impact on the world.
The tech tree is also something to be amazed of, each tech you unlock as you progress through the years has a significant impact on the game and how you play the game and if you are able to survive the onslaught of enemies.
The economy is also complex and at times quite hard to manage, luckily the difficulty level can be adjusted to give new players an easier start on managing their resources. The buildings you can construct to help your economy range from simple wood managing complex to uranium mines. The economy also plays an important role on your armies, without petroleum your units will not move, without ammunition they will not fire, without construction materials you will not be able to build new structures and without food your population and army reservers will die.
The game is a must own to all Grand Strategy players, the game not only offers a singleplayer campaign and different skirmish / scenarios to play but also a multiplayer mode where you can fight with other players that control their own nations in real time.