Crossfire Sector, available on itch.io, seems like a simple nice little game. But there is much to discover here, and it has far more tactical depth than I initially expected.
On a chequered board, you fight 5 vs. 5 (with some factions only 4) against each other. In the base game (there are expansions which add leaders), all 5 models are exactly the same; the different factions play differently as they lay the focus on different aspects.
The game is setting and miniature agnostic.