Volta-X will no longer be available for purchase on 8/5/2022

An Important Announcement About Volta-X
Volta-X will no longer be available for purchase on 8/5/2022 and all multiplayer servers will close on 11/4/2022.
On August 5th 2022, Volta-X will no longer be available for purchase from Steam, and all multiplayer servers for Volta-X will close on November 4th 2022. After that time, the online mode will no longer function. You will continue to be able to play single-player after the servers close and will keep all content you have purchased.

Thank you for playing Volta-X, and we appreciate your kind support.

no it is not always online. as devs told i suppose you can still play singleplayer when servers will go off

you can complete the main story in 3-4 hours so yes for 2$ it worth

I haven't been able to find any gameplay videos longer than an hour in length, so it's hard to use them as a reference for the game's longevity (and HLTB doesn't seem to have any postings for it) but, looking at the videos, I get the impresion that the UI has issues, the gameplay seems extremely repetitive, and the puported similarities to FTL seem entirely superficial, lacking any legitimately similar approach in any of its general mechanics, combat elements, or exploration/management elements.

Rather, it seems to be a micromanagey arcade game (think just the part from FTL where you put out fires and manage airlocks or, perhaps more fairly, most any kind of [eg, cooking] worker management game, where you're constantly shuffling workers around to meet customer needs) blended with a simplistic mech game, with the gear customization approach one'd expect from the latter.

Given what seems to be a pretty unchanging combat dynamic of moving characters between the various weapon rooms to repair and activate the weapons in those rooms, I'd say to look at one of the longer gameplay videos [so you can skip past the more rigidly presented tutorial stuff at the start] and see if the combat loop seems up your alley.

From what I can see, there doesn't seem to be any real replayability, as there doesn't seem to be any meaningful possible deviations in the progression path of the gameplay.

Well, this is what I got from watching through every gameplay video I could find on youtube, maybe it'll work for you until you can get input from someone who's actually played the game (which, going off the quantity of Steam reviews and lack of info on HLTB, does unforrtunately appear to be a rather phenomenally small grouping). That said, ngrazer did post some first-hand insights in a recent comment below, so that's likely to be worth a look.