Rogue with no sneak attack?

[Yabaddi]

I'm not familiar with 5E build of D&D but I always thought that this particular feature of rogues (sneak attack) is constant. Usualy additional 1d6 of damage since 1st level while conditions are met.
While playing demo of Solasta, by old habit, I tried to use my rogue to sneak behind particular enemy I wanted to eliminate at the start of the fight. So I placed him behind the wall next to an unaware orc and started a fight with another character. My rogue was hidden while his turn begun and his opponent was facing another direction - so the usual conditions were met. Despite the successful hit roll there was no additional damage done.
Can someone explain it to me? Perhaps I am missing something or there is no such mechanic in Solasta but that would be extremely weird because this is the very base feature of any D&D revision.

[SeekerSK]

I'm not up to date on the 5e rules either so I'm not going to try and guess as to why you weren't seeing the sneak attack happen. But the mechanic is definitely there as I've done sneak attack damage several times. I can say that it isnt necessary to be behind a target to do sneak attack. I'm not sure facing matters at all.

[SeekerSK]

Yoinked this 5e explanation of sneak attack from the net:

"Beginning at 1st level, you know how to strike subtly and exploit a foe’s distraction. Once per turn, you can deal an extra 1d6 damage to one creature you hit with an attack if you have advantage on the attack roll. The attack must use a finesse or a ranged weapon.

You don’t need advantage on the attack roll if another enemy of the target is within 5 feet of it, that enemy isn’t incapacitated, and you don’t have disadvantage on the attack roll."

So I'm guessing you didn't have advantage against the target. What all of the conditions for getting advantage are, I dunno. Btw, in case you're unaware about advantage/disadvantage and what it means: It's a bonus/penalty status where instead of rolling 1d20, you roll 2d20 and choose the best result for advantage/worst result for disadvantage.

[Yabaddi]

I am aware of adventage/disadventage mechanic. Besides, Solasta has a very clear combat log that allows to follow all of the actions and rolls.
I don't know what I am doing wrong but my rogue seems to be unable to perform a sneak attack - I quicksaved before that fight and tried it over and over just to check if I am missing something.

Edit:
I was a total dork. My rogue for all that time was equiped with non-finesse weapon. Doh! I switched to short sword and ... voila! It works!

[DiceWrangler]

You can Sneak Attack with a bow too as long as an ally is adjacent to the enemy (since you cannot hide yet?) Also, at 3rd level, the Rogue inflicts +2d6 Sneak Attack damage.

[Yojimbo]

You can get sneak attack a number of ways in 5e. Having advantage (which can happens lots of ways, usually by being unseen) or by having an ally adjacent to the enemy. The easiest thing to do is simply attack an enemy that has another PC next to it. It's much easier to accomplish in 5e that in previous editions in my experience, but can only be done once per turn. So a dual-wielding rogue only sneak attacks on his first hit, not both. You can get your sneak attack on an opportunity attack on another characters turn, though, in addition to your own turn.

I'm guessing that the problem with the situation you described in your original post is that the game doesn't have a way of handling in-combat stealthing. I noticed that the rogue doesn't have a "hide" action (or actually nobody does) for use in combat, particularly with his cunning action. In 5e, mid-combat stealth should be doable if you meet certain conditions. My guess is that as soon as combat begins, none of the party are considered stealthed. So the rogue was not hidden. I have successfully sneak attacked with his bow when firing from stealth on the orcs to initiate that fight, so it's possible to get it from stealth. Just maybe not during combat.

It's a real shame and something that I hope is addressed before the game is released. Ducking in and out of cover, using your bonus action to hide and firing a ranged weapon while hidden, is a tried-and-true method of combat for rogues in the rules of 5e that hasn't been translated faithfully into this game.

In the meantime, just have the rogue attack enemies that are next to his allies. Ranged is safer, obviously, but more difficult because of cover. Melee is riskier but gives you two chances to hit and deliver the sneak attack damage because of dual wielding.

[Grayhorse]

Sneak attack worked for me. The key is to have a party member in combat with the creature you are fighting. With that done, the sneak attack works like a charm.

[Wild Stardust]

Joining the clarification bandwagon. Sneak attacks do work in the demo; as listed above by the detailed posts.