What about the pve in RoM?

We don't know much yet about pve in RoM, but it will be for sure something like we already know in other mmo's.

Runes of Magic will feature raids and fights against boss opponents. Players will encounter mobs in instances and within the open world. Besides static dungeons, Runewaker will introduce so-called tile-based ones that change by re-generating themselves every once in a while.

We'll have diverse and unique zones, like the Wailing Mountains, Silverspring, Aslan for example. We also know some names of some dungeons as Forlor Monastery, Mystic Altar, Reliquary of Reflections or Kleeon's Temple.

What kind of questing will it be?

For the quest-system, we'll have mostly plot quests, that tell the tale of the world and the storyline. Plus, we'll have hundreds of side-quests to do.

How will the inventory work?

As in other MMOs, what you are going to loot will go to your inventory. The inventory contains 40 slots (You may be able to upgrade it later to make it contain more places). You can also find in your inventory some options to make it more readable. For example, you'll find a tip that tells your how many places left you have, a filtering option and more..

What about the loot-system in the game?

For the loots, it seems that there is an auto-loot system. When you loot a mob, it goes automatically in your bags and your inventory. (Thanks to barbariank for the info)

You can watch a PvE video where you can see many things about PvE here (Proposed bybarbariank too)

You can dl and watch a video by maltaner87 about PvE groups in the game here.

What about the pvp in RoM?

Basically,  Runes of Magic Gold will have a common duel system and arena combat. Within the open game world, PVP is only open for players who actively “flag” themselves for it. If somebody wants to peacefully play PVE only, they can simply un-flag themselves. As a result, the PVP system of  Runes of Magic Gold won’t interfere with the game play experience of players focused on PVE. It’s only an additional feature so to speak. But there will be PVP only zones and when a player enters these, he will join PVP automatically. Within the arenas, players are able to take part in tournament style battles.

The Taiwanese developer Runewaker also plans to implement faction based PVP and guild wars. In addition to that, they are developing server vs. server combat as a very special feature. When this feature is ready, the whole community of one server will be able to fight the players of another in a massive server war. All results of PVP fights attribute to the players’ PVP scores, which derive from acquired wealth, title and class, and will decide his overall ranking in the game.