Legion Wars is on sale.
Gun game, but tough. It’s best describes as Age of Wonders meets Advanced Wars.
The graphics are cartoony, but the factions are distinct. Unique units, unique magic, and each faction gets a slightly different tech tree.
Also, units can be upgraded with perks and items, but the upgrades impact all the units of that type.
As an example, the Undead have weak skeletons. Their first upgrade is to cut their cost in half, or make them more powerful.
Making them more powerful makes sense if you if focus on Skeleton mages, because they can summon more skeletons for free.
At the same time, their are techs that allow you to build barracks for free, and have them generate gold. This allows you to build extra skeletons, so half price skeletons works with this play style.
There is also a Rogue like mode were you start with a few heroes, and have to survive multiple waves of enemies. Hero units level up, and gain items they can equip.
The only downside of this game is the lack of online multiplayer. It’s hot seat only.