Returning Player in need of do-all build

[Jeremopolis]

I'm returning to the game for the first time since 2019. I barely played any expedition, and i've gotten to DC twice and quit. I need a (hopefully fun) build that will let me finally finish the game, hopefully experiencing almost everything it has to offer as well, when it comes to stat checks etc. So i need a build that lets me pass all checks and beat the hell out of the game, finally.

[RewRatt]

I'm returning to the game for the first time since 2019. I barely played any expedition, and i've gotten to DC twice and quit. I need a (hopefully fun) build that will let me finally finish the game, hopefully experiencing almost everything it has to offer as well, when it comes to stat checks etc. So i need a build that lets me pass all checks and beat the hell out of the game, finally.

I don't think it is possible to pass all checks, as some are really high STR or AGI checks. But for say... Persuasion checks, Mercantile - a PSI build with high WILL and INT can do without nerfing itself.
IMO most flexible PSI build is this: https://stygiansoftware.com/forums/index.php?topic=7642.0

It's Temporal Manipulation/ Thought Control build. Deals with all targets very well from very early on. And traps skill will help in Detection. You can drop some points from Traps/Stealth to invest more into Persuasion or Mercantile.

[YawaUR]

I have a 3/7/7/3/18/3/7 (str/dex/agil/con/per/will/int) build that specialises in crossbows, stealth, evasion. Makes heavy use of traps, occasional throwing. Can pick/hack anything (with relevant buffs here and there). High mech/electronics to craft, a little bit of biology/chem for bolts and stuff, some in per+merc because its useful. I feel like I get the best of everything really. Can sneak through shit if I CBA, I usually KO everything quickly due to high damage and crit % (feats and such), I spot everything, I can boost agil+str high anyway with relevant items for those checks. I only play normal and consider myself pretty casual, which is why I like evasion, even if I doubt its usefulness.

[Easy]

Here's an AR/armor/Temporal Manipulation build that can handle everything well. Definitely recommended if you want to beat the hell out of everything, as long as you find the burst mechanic fun. Because from mid-game on pretty much every fight is going to consist of bursting everything and using Psycho-temporal Contraction and self Stasis to burst everything even more.

https://underrail.info/build/?HgkDAwoMAwbCoHIAAAAAAGBsAADCoMKgV2NsAAAARgAAditjTzsmFcKHSidJKjFLCFDCtcKkVcOMwq3in6IF4qe0Ct-_

The build also has a ton of extra skill points. I don't think persuasion, intimidate, and pickpocketing are really worth it, or even traps or stealth on a build like this. So the skills in the version I linked are set up so you can pass every crafting/lockpicking/hacking/mercantile check without consumables or swapping in a certain knife, and also use the high level mechanics and electronics components you might find after a certain elevator ride. But you can definitely drop those skills lower, and also some throwing, if you want to pick up additional skills. Don't think it's possible for any build to pass every skill check though.

[Niko]

Here's an AR/armor/Temporal Manipulation build that can handle everything well. Definitely recommended if you want to beat the hell out of everything, as long as you find the burst mechanic fun. Because from mid-game on pretty much every fight is going to consist of bursting everything and using Psycho-temporal Contraction and self Stasis to burst everything even more.

https://underrail.info/build/?HgkDAwoMAwbCoHIAAAAAAGBsAADCoMKgV2NsAAAARgAAditjTzsmFcKHSidJKjFLCFDCtcKkVcOMwq3in6IF4qe0Ct-_

The build also has a ton of extra skill points. I don't think persuasion, intimidate, and pickpocketing are really worth it, or even traps or stealth on a build like this. So the skills in the version I linked are set up so you can pass every crafting/lockpicking/hacking/mercantile check without consumables or swapping in a certain knife, and also use the high level mechanics and electronics components you might find after a certain elevator ride. But you can definitely drop those skills lower, and also some throwing, if you want to pick up additional skills. Don't think it's possible for any build to pass every skill check though.

I would also suggest the AR in all honesty. It is a little bit more straight-forward like said above, but it can punch through everything with no sweat and tears. Key feats are concentrated fire, full-auto and commando. Everything else is just extra basically.
Take pickpocketing as well to steal bullets for the early game, and up to 50 effective is still good to have anyway for extra adrenaline shots. Guards pack a stack of 100x 8,6mm, most of the time.
And like it was said in the above posts, it is definitely a feat to pass all skill checks even for an underrail connoisseur with just one build. There are lore related things and stat checks. Perhaps with enough study, someone might come up with one to pass 99% of them with the correct stat foods and drugs.

And, ofc, welcome back to the best post apocalyptic RPG ever made!