Just any other Free to Play game, you should pick this up for an hour and give it an open-minded go.
In this game you build a tiny vehicle (I say vehicle, because robots do not require a pilot, because it is esstentially it's own pilot, but vehiclecraft doesn't sound as good, so I'll call it a robo) and then fight using it against other players who have built their own robot.
You can build whatever you want. If you have the parts, it can be made. I've seen people make literal spider walkers (are usually seen in challenge mode or late into the game, like 80% into it), an smg car shaped like a person, a heavily armored box car, a car only describable as a quad from dune 2000, even a flying ♥♥♥♥♥ that one time.
You can make jets, hovercrafts, "drones", actual drones, helicopters, tanks, cars, and you can get to the end of the game's current progression to make gigantic versions of these where you can either pit it against tons of smaller, weaker enemies, or fight in a battle filled with giant robos!
I have only gotten 27% into the game, Tier 3, but already I can make hovercraft, cars, tanks, hybrids of either of those and stuff.
There are indeed weapons, and they all have their own uses and strengths and ways of using them. Indeed, this isn't call of Duty where tons of weapons exist, but all of them in a category all work basically the same.
You've got 4 weapons. SMGs, Plasma Cannons, Railguns, and Nanotech Disruptor which heal allies and deals damage to enemies in a straight beam.
The game abides by physics most of the time, so if your robo is not properly made, then you can expect to find problems, luckily there IS a practice mode that has no penalty or reward, filled with enemies you can test your robo against, some of them potentially player-made (THAT NEEDS TO BE A THING IF NOT! <3)
This game is fun, just... don't get discouraged if some turd with a railgun goes into Tiers 1, 2 or 3. It happens a decent amount even though Tier 5 really should be a cut-off point for tech being below the tier it was meant for (Aka railguns below Tier 4 battles, or Helicopters below Tier 5. Walkers below Tier 7 isn't much of a big deal honestly because they're cool to the point I wished there was a Tier 4 version of them).
you won't be able to make the robo you want to from the get-go (I personally have an obsession for walkers, sometimes bordering on fetish-territory if you throw on some missile launchers and beam cannons onto it xD).
The only real downside to the game is the inability to mix and match weapon types. I suppose it helps for balance reasons, but it'd be cool if you could have two weapons at a time. Though then you could have medic guns on railgun planes, which would be a tad unfair.
Each different item has its purpose and use, th only thing that is really much of an exception are the blocks, but they are instrumental in being tough to destroy as without them... well you're not tough to destroy as the original blocks are free for a reason.
Spoiler: They're garbage above Tier 1.
There's also Electro plates, which are indeed shield technology, but the precursor to it.
Feel free to download this game and give it a try, it's really quite fun! Personally building the robo is my favorite part, let alone actually using it, which is even better.
It's really fun.
I also give this game a 6/10, which says alot for it's current state. There's not alot of bugs left and the devs have taken time and actually tried in their endeavor to make a great game which has probably very little content in comparison to the finished result, and 0 bugs or glitches pretty much.
PS: This game has support for us OCD buggers who have to symmetry everything in the mirror mode. Press X or map the key in the controls menu under "Build"
Happy Building, and Merry Killing!