Top similar games like Biblios: Tome of Darkness:

Classic, dark ambience in a bloody and difficult retro FPS. Fight cultists and demons who are as dangerous as you in your fight against the Maledictor.

Deepest Darkest is a 90s as hell and metal as hell boomer shooter. Shoot your way through an action packed single player campaign with an arsenal of weapons, power up and magic spells as you tear though an army of cultists and monsters.

BRUTAL shooter focused on action, gore, and old school death metal music. Unleash your overpowered arsenal to goreblast hordes of ferocious beasts on your way through ancient dark forest.

Hordes of Necromancy is the third game in the Hands of Necromancy series. This time, the gameplay aggressively focuses on large hordes which the player destroys by packing even more power!

Fast-paced, skill-based FPS with puzzles, platforming, secrets and deep lore.

Serious Sam: Siberian Mayhem is a new stand-alone expansion to the world of the classic FPS series. Join the fight against Notorious Mental on a journey through the wild lands of Russia, and find your way through this lost chapter of Sam Stone's adventures.

Hands of Necromancy is a Dark Fantasy FPS metroidvania, inspired by classics such as Heretic and made with the GZDoom engine. Wield weapons, magic or transform into a fearsome monster to slay your foes, then raise them as undead servants and unleash even more carnage to become a master Necromancer!

A dark fantasy shooter where the dead know no rest. Journey through nightmarish dimensions where survival hinges on magic and firepower. Every upgrade, spell, and choice leads to salvation or demise. Uncover the truth… or let it consume you.

Fallow fields birth strange life. Battle botanical abominations and a fanatical militant cult as you journey through a dark and distorted vision of the Danish countryside. Experience deep lore, thick atmosphere, and razor sharp mechanics in this raw yet refined classical narrative FPS.

Fight your way through armies of Nazi occultists, religious zealots, and unspeakable cosmic horrors to unveil the Eldritch secrets behind the war theatre in this 2000s-era-inspired grimdark singleplayer FPS where WW2 meets Cthulhu Mythos.

Embark on a journey into the darkest nightmares to restore your sanity. Blast your way through hordes of possessed enemies, unlock an arsenal of deadly weapons and unearthly abilities, and get ready to face even more Lovecraftian madness in this action-packed FPS sequel.

Face off against hell forces in shooter "Grimwalker". Engage in thrilling combat with a variety of weapons and use your demon form to become even more powerful. Explore a world filled with secrets while managing your resources to survive.

HROT is a single-player retro FPS set in a small socialist country neighboring Soviet Union (Czechoslovakia) after an unspecified disaster in 1986. Those times were dark and terrifying and so is the game.

A retro FPS for the ages! Once branded a HERETIC. Now YOU have been chosen as our champion! Reclaim our sacred weapons. Take back our ancient lands. If you can stand... AMID EVIL.

Use a rearview mirror to fight through a horror-filled hellscape in this Doom-inspired retro-fps. Shoot behind you, detect invisible enemies & never fall victim to enemy traps.Find new weapons, unlock abilities & warp to maps at any time!Objects In Mirror Are Closer Than They Appear!

So.... got what it takes to be a X Slayer?!?... 7 weapons, blood and gore, twisted music by Seepage & Psyko Syndikate, and maps where you can blow up everything. its awesome. started making it in 1998 in high school with my friend and now im 37, so i have life experience now.

A nerve wrecking struggle against industrialized human sacrifice, and an army of flesh husks in the deepest reaches of human understanding.

An action packed sci fi FPS set aboard a massive spaceship, where reversing gravity changes the way you fight and the environment helps you eliminate enemies.

Crimson System is a dark and dynamic boomer shooter. You fight your way through places full of the dead, monsters and fortress-sized bosses. You can possess some of those who are hunting you.

A horror action-adventure with a gripping story. Fight through the forest using energy granted to you by greater powers lest you succumb to the will of the forest guardian Leshy.

Hands of Necromancy II is a dark fantasy FPS sequel, inspired by classics such as Heretic and Doom. Choose from two characters, wield new weapons and learn even more powerful spells and transformations to prove once and for all that you are the supreme Necromancer, master of death itself!

Zan and her orc sisters must fight to save their homeland from a demonic invasion! Immerse yourself in a sprawling underground world where the rich lore, exploration and puzzles of classic adventure games blend with the visceral combat of a 90s' shooter.

A first person shooter that sets you far away, near death.

Survival Horror in first person where you must manage your ammunition well, explore varied scenarios and face nightmarish beings, while investigating the macabre experiments with children, the result of a mind unhinged by madness and family loss.

"The Book" is an old-school-inspired, action-packed first-person shooter set in a pirate world overrun by supernatural entities. Craft and upgrade steampunk-styled magic weapons as you fight your way through.

A warrior can't find peace even after death if he's offered a reward for bringing back a demon determined to take over the Earth. Welcome back to the land of the living, take up arms, forget fear and go hunting!