been playing this recently. The Great War: Western Front. its a mix of a strategy game and RTS. pretty fun, was only $40, but I am seeing some sales that get it down below $30, unfortunately those sales aren't on Steam.
Game is pretty fun, challenging. I have been playing purely defensively. I started as the allies, couldn't figure out how to effectively go on the offensive, so I switched to the Germans and had the same issue.
The combat seems pretty realistic, you will lose tons of infantry. battles don't scale properly in my opinion.
only other complaint i have is there "permanent" battlefield aspect its very picky and choosey. The premise is that any defense you place in one battle should show up in the next, and that any battle damage is supposed to linger. the trenches, and barbed wire do stick around which makes defense easier as the war progresses as you will fight over the same territory. However any weapon emplacement goes away and you have to re-buy every time. I wouldn't mind a higher upfront cost to place it, but then "manning" that weapon emplacement shouldn't be expensive the next time. You can blow up any existing buildings on the battlefield, or any fences or other man made things which is a nice feature. and the ground in some areas will gradually get shelled out in places. But the little forest that I have shelled literally hundreds of times remain untouched in the battle, offering continued cover battle after battle, leaving a relative week point in my defense.
I also have some gripes with some things not being balanced very well. Aerial bombers are way OP dropping guided munitions that never miss, while tanks are way too fast, and rifles do more damage than artillery to tanks. but its the same for everyone.
if you ever wanted to be a general of a slug fest, this is a good game for it.