here are my two best games ever;
1.Arma 3 with it's expansions and most powerfull editor and modding tools created.
It is detailed open world/sandbox military sim with amaizing graphics details giving player endless fun and unlimited options with beautiful multiple maps
this is mission 3d editor called eden capable of creating the most complex missions and campaigns on scale such as game developers deliver us;
2.second on my list is IL2-Battle of Stalingrad with it's expansions il2-Battle of moscow and upcoming il2- Battle of Kuban. It is very realistic WW2 flight simulator with amaizing flight and damage model, nice graphics and editor.
now all i missing is space Arma3 and i hope I:BS will fill that place with offline mode and modding tools when certain goals are reached, with great engine and graphics capabilities it can be groundbreaking game, i mean it will be.