To quote Laserllama:

"Become the master of occult lore you were meant to be!"

This is, as close as possible, a recreation of Laserllama's Alternate Warlock class.

Some warnings:
- This is the first version.
- Not thoroughly tested, and has plenty of bugs

WARNING Incomplete/Buggy content:
The Pact of the Tome, while in the game, is buggy, and functions poorly. It does not allow you to inscribe spells into your book, and it's elder arcanum does not work. The entire pact as whole needs either significant revision or experimentation to make it feasible, though the engine does not support many of its features.
Pact of the Blade's Elder Arcanum isn't working? Will likely be fixed quickly.
Great Old One's 6th level feature, Psionic Ward, has not been tested. May or may not work to some extent, and may or may not depend on turn-based mode being enabled.


An overview of what comes with the class, including notes:

Main Class
First Level:
Eldritch Blast (Slightly different compared to the 5e warlock), Eldritch Invocations (2)
Second Level:
Spellcasting (Follows standard Warlock spellslot levels, and has reduced spells learned, but higher spells known total and a slightly different spell list)
Subclass (Otherworldly Patron)
Third Level:
Pact Focus (Blade, Chain, and Tome)
 - The blade and chain are relatively unchanged, but the tome has changed significantly
Eldritch Invocation (1, 3rd level)
Fourth Level:
Feat
Fifth Level:
Deepened Pact
 - Similar to the Larian adaptation. Instead of being invocation tied, you simply get it. Notably, also uses the larian pact improvements 1:1, excluding tome, which learns 6 ritual spells (to compensate for being unable to learn them like a wizard could)
Eldritch Invocation (1, 5th level)
Sixth Level:
Otherworldly Patron Feature
Seventh Level:
Eldritch Invocation (1, 7th level)
Eighth Level:
Feat
Ninth Level:
Eldritch Invocation (1, 9th level)
Tenth Level:
Otherworldly Patron Feature
Eleventh Level:
Elder Arcanum
Twelfth Level:
Feat
Eldritch Invocation (1, 9th level)

An overview of the subclasses:

Fiend

2nd Level:
Patron Spells, Fiend Eldritch Blast (Increased damage, Fire damage, and ignores fire resistance)
Gain 2 patron spells as known spells at 2nd, 3rd, 5th, 7th, and 9th level. Among the spells is Immolate, a new 5e spell.
Dark One's Blessing. Works much like standard Warlock.
6th Level:
Dark Bargain. Add 1d10 and take 1d10 damage to a saving throw or check. (May have a bug with it working on other character's checks? Needs testing/bug fixing)
Accursed Blast. Your eldritch blasts prevent healing when they hit
10th Level:
Fiendish Resilience. Same as standard Fiend Warlock

Great Old One

2nd Level:
Awakened Mind. Resistance to Psychic Damage
Patron Spells, Old One Eldritch Blast (Increased damage, Psychic damage)
6th Level:
Mental Lance. Your eldritch blast prevents reactions on hit
Psionic Ward. Similar to standard warlock's Entropic Ward, but instead of advantage on your next attack, you make a single eldritch blast attack. 5 uses per long rest. (Looks to be working. Needs testing)
10th Level:
Thought Shield. Adjusts your wisdom saving throw bonus to be the same as your intelligence modifier. (Int + PB)

A quick overview of the Eldritch Invocations and Elder Arcanum:

Eldritch Invocations:
Armor of Shadows
- Unarmored Defense
NOTICE: The starting gear is LIGHT ARMOR, and PREVENTS this invocation from working until equipment is changed to clothing.
Beast Speech
- Same As Warlock
Beguiling Influence
- Int Mod bonus to Deception and Persuasion checks
Devils Sight
- Same As Warlock
Eldritch Sight
- Detect Magic, unlimited uses
Otherworldly Vigor
- Int modifier temp hp on bonus action
Mask Of Many Faces
- Same As Warlock
Cloak of Decay (3rd)
- 5 ft. AoE small tick damage, dis adv on charisma checks, but adv on intimidation
Eldritch Spear (3rd)
- 1.5 times range. WARNING: Unlikely to work. Needs to be tested
Grasp of Hadar (3rd)
- Pull enemies towards you on eldritch blast
Lance of Lethargy (3rd)
- Slow enemies on eldritch blast
Repelling Blast (3rd)
- Push enemies away from you on eldritch blast
Blasphemous Prayer (5th)
- One option for each channel divinity. Allows you to cast a cleric subclass's level 2 channel divinity once
NOTE: May not be stackable. (The descriptions are the respective channel divinity descriptions, some are missing information)
One With Shadows (5th)
- Once per long rest, cast invisibility in a lightly or heavily obscured area.
Tomb of Frost (5th)
- Same as warlock's tomb of Levistus. May be changed to Laserllama's version later.
Vitality of the Everliving Ones (5th)
- Heal max if near your Pact of the Chain Familiar
Ascendent Step (7th)
- Fly as a bonus action
Eldritch Smite (7th)
- Only works during turn based mode: Deal your eldritch blast damage and effects after hitting with your pact blade.
WARN: Seems to have an issue with dealing the damage. Fix implemented, needs testing
Occult Servant (7th)
- Once per long rest, cast one of your patron's spells without using a spell slot.
Whispers of the Grave (9th)
- Same as Warlock
Favor of the Master (9th)
- Grant your Chain familiar a warlock spellslot to cast on a handful of spells, determined by their form


Elder Arcanum

Level 6 Spell

Improved Pact Options (Tome, Chain, or Blade)
Blade: A third attack, and you can teleport after each attack (Seems to be not functioning atm. Fix in progress, testing needed)
Tome: Prepared spellcasting (NOT FUNCTIONAL, very likely not possible)
Chain: Transform your familiar for 1 minute into one of 3 forms

New Pact Focus (Gain Tome, Chain, or Blade, while keeping your first focus. This also applies Deepened Pact to it)