Andy Beckwith, voice actor for Harkyn in Lords of the Fallen, also voiced Captain Drummond in Dark Souls 2. Both games share similar art and game style.
Lords of the Fallen takes heavy inspiration from the Dark Souls series. They both contains a similar art style, plot, and control scheme.
Aside from its obvious parallels to the Dark Souls series, Lords of Shadow also has similar plot elements the Elder Scrolls IV: Oblivion: A single hero is called upon to fight demonic beasts crossing over an alternate dimension.
Lords of the Fallen is one of many games known as "Soul Clones", or games that bear heavy similarity to the Dark Souls game series. These types of games are known for mixing exploration and loot hording with powerful enemies, intense difficulty, and repetitive death.