Skillgems that grants spells and attacks can be altered to some degree.
Well, that's a bit of an understatement. I mean, a leap attack or a double weapon swing will always fundamentally be the same thing,
but you can tweak pretty much every parameter with support gems as long as you have them and the item to put them in.
Might not be practical, might not be optimal dps, but you can do shit like convert damage into a different type,
partially or even fully, resulting, for example, in a frost bolt that both freezes and burns enemies at the same time.
Then add all kinds of debuffs to it. Bleed, impale, stun, blind. Or make the skill heal you. Or make it fire multiple projectiles. Or pierce opponents.
With simple shit like summon skeletons, you can use it to pop a bunch of skeletons between you and the enemies,
or use a corrupted version of the skill which feeds on souls and once it's fed enough will raise an entire army in one pop.
You can cast this spell with mana, as intended, or pay the cost from HP. You can put it on a totem which will shit out a stream of skellies as long as it stands or you hit the summon cap.
You can make the skeletons pop out when you score a critical hit on an enemy, or when you are hit by enemies. It's even possible to make those skeletons turn shit they kill into ghosts.
The AI isn't spectacular, but I've seen support gems that would produce skeletons with a defensive profile, or an offensive one. Or ones that let you mark specific enemies for them to kill.
Skeletons that explode on death are also within the realm of possibility, but you'd have to look for the right nodes in the big ass skill tree.
So yeah, you can have this much fun just enslaving nations with necromancy, and that's one skill.
Not *every* combination of effects is possible, but there's still plenty to work with, and most of the logical combinations work as one would expect. Here's a wiki page to give you some idea:
https://www.poewiki.net/wiki/Support_gem
But, let's not turn this into a PoE wank thread. A few more off the top of my head.
Since you know and like MissionForce Cyberstorm, you probably also know about
Mechwarrior games. Plenty to choose from, from MMO, to single player "sim" and RTS,
each letting you kit out your mechs with different weapons. There's even a recent-ish turn based tactical offering which seems to be tolerable when modded
(though resident battletech enthusiasts will happily give you an earful about everything that's wrong with it).
Myself, I had good fun with the older ones, Mechwarrior 2 and 3 mostly, Mechcommander was good as well. Spent some time on Mechwarrior Online,
but I must concede that it turned to shit eventually. Tried picking it up some time ago and it ended up pretty horrible.
I've also had the
WWE series of wrestling games on my radar for some time. Plenty of red flags, as far as I'm concerned,
for one it's released every year, like the fifa games, and judging from the youtube vids I've seen, it's not there yet when compared to other, proper fighting games,
though the WWE2K22 edition looks like it's getting there. Seems to deliver when it comes to character customization.
There's also this game,
Bionic Dues, which looks rather similar to the stuff posted in the OP, so you might give it a go as well.
Basically, a roguelike where you build custom robots and send them out on different kinds of missions. Turn based, top down view.
Now scraping the bottom of the barrel, there's
Spore. Damn that game, it had so much potential and could be so much more.
Why did they have to make it so painfully shallow and simplistic? Still, it's fun customizing and "evolving" your own race of creatures from single cell to sentience.
Especially in the first couple of stages, because that's the only point where your choices actually matter.
Despite its age, the in-game creature editor remains a very powerful tool which, to my knowledge, hasn't been copied or even matched in functionality since then.
Pretty fun to play in its own right.
And how about Peter Molyneux's
Fable? It's an RPG-lite slash action game where you basically build your own breed of fantasy hero, down to the nickname you'll be called by the villagers.
You pick the skills, loadout, morality, and it's all reflected in the characters appearance.