I've been getting more in to these online "freemium" Sim Combat games.
War thunder (by Gaijin Entertainment) is still my favorite but I've also trying World of Tanks
(by a company called Wargaming.Net). It's the same late 1930 - mid 1950s decades but I'm not so keen on this one as it's more money hungry.
As these are a freemium models you can play for free but you can also purchase premium accounts and premium vehicles etc. War thunder is OK and you can still be competive without paying it's just a little slower to progress.
WoTs more complicated and detailed in the research, crew skills and equipment aspect of the game. By itself that's fine if you like that sort of thing but War Thunder is much more linear and simple. In WoT though, you need to spend actual money to buy and use the "premium ammo" for your tanks which I think is harsh.
However my newest venture is World of Warships
. Again similar era just on the high seas!
Being an old git with the reactions of a sleepy sloth, WoWS great since it's a much slower, much more tactical game. The reasearch and tech element is far easier and most importantly boats can't fly, climb mountains or hide behind buildings.
Which is always a bonus if you're old and slow like me.