The game is based on the Dungeons & Dragons 3.5 edition, while Guido Henkel, the producer of Planescape: Torment and creator of Realms of Arkania, helped design the game world by contributing to the world history, cultures, lore, and the main plot line. The developer cites classic computer Role-Playing Games such as Temple of Elemental Evil, Gold Box series, and Ultima as major inspirations.
This game provides examples of:
- Arbitrary Headcount Limit: The Kickstarter trailer promises a party of up to six playable characters. This limit does not include animal companions or familiars.
- Dem Bones: Skeleton Warriors are seen at one point in the trailer.
- Dialogue Tree: This is a traditional CRPG, and so the trailer shows multiple-choice conversations as well. Later development updates also portray that the conversation options and NPC responses will change in accordance to many variables, such as the player's sex, race, class, current equipment, etc.
- Dual Wielding: The Kickstarter trailer portrays perks for "Improved Two-Weapon Fighting" and "Two-Weapon Defense", as well as characters actually carrying two melee weapons, so it's safe to say that this D&D staple will be present in the game.
- Fantasy Character Classes: Nine D&D classes (Wizard, Cleric, Barbarian, Paladin, Ranger, Monk, Fighter, Druid and Rogue) are shown as playable in the Kickstarter trailer, and there'll be the option to promote them to various prestige classes.
- Healing Hands: Paladin's ability to heal in this manner from Level 2 onwards, "Lay on Hands", is briefly shown in the Kickstarter trailer.
- Horny Vikings: A Fighter character is shown at one point of the Kickstarter trailer with a horned helmet.
- Ideal Illness Immunity: The Kickstarter trailer briefly shows that like in the original ruleset, a level 3 Paladin will gain an immunity to all kinds of diseases, even including the magical ones.
- Overworld Not to Scale: The Kickstarter trailer portrays a pretty large traversible world map; even so, a party of adventurers takes up as much space on the overworld as a city, and is wider than the bridges on the river. Notably, there are other on-map NPCs that will also move around at the same time as the player characters, such as trade caravans, or groups of hostile lizards, scorpions and spiders.
- Rat Men: The Kickstarter trailer at one point portrays an ambush on the party where Skeleton Warriors led by a Cursed General are also supported by Rattling Archers.
- Retraux: The Kickstarter trailer begins with the collected footage from GoldBox-era CRPGs, while referring to them as "Long gone, but never forgotten." The next shot is a mock-up box art of Realms Beyond itself, done exactly like the GoldBox games, and then it flips onto the back of the box, and zooms in on each point in order to illustrate it in detail.
- Wizard Needs Food Badly: The Kickstarter trailer lists managing supplies through buying rations or foraging the land as one of the features on the back of the fake GoldBox art.