Men of War Assault Squad 2.
Is an absolutely fantastic RTS from Ukrainian developers Best Way.
It's simply the best fun, most enjoyable, difficult, wargaming experience it is possible to have on a PC.
Tired of WW2? use the vast collection of mods available to flip into the Star wars universe or fight for the Rebels during the American revolution. It's deep. It is infinitely replayable in SP mode and MP/co-op by the shipload.
Also, it costs nearly nothing.
