The game runs poorly on the Steam Deck and lowering settings doesn't do much, since they barely have an effect on the graphical fidelity and simply don't go down far enough. The game barely manages to crack 30 fps at the start of missions, and the more units are involved, the worse the performance gets. When you have regular sized squads fighting each other (which is most of the time), the game frequently drops to around 15 to 20 fps.