The game is a wargame that puts an autistic amount of focus on the logistics aspect of it. You have to build fobs with different utility buildings and sleeping quarters. Feed your soldiers, supply them with ammo, rotate them from the front when they get exhausted, medevac wounded ones and give them blood transfusions before you get them into base for emergency surgery. You get some resources form central command and doing well will let you requestion more but you'll have to scavenge for others, disassemble captured vehicles for parts to repair yours. Things like ammo belts and drum mags have to be pre-prepared at your base. It's a pretty specific take on realism and I found it weirdly compelling. The setting is a civil war in some not!yugoslavia 1991 using mostly soviet equipment.
It's officially a "demo" but that is probably because the jap (which is sort of unusual by itself) doesn't understand what early access is and he's constantly updating it. There's enough content to play for a while.