DelzGB

Within the virtual world of “Avalon Online”, Finn, or otherwise known as “Echo” within the game, was one of its greatest players. After logging off from a long session, however, he notices something awry outside of his apartment. 
The streets were flooded with chaos, screams echo through the night, and hell is loot loose. Monsters from Avalon Online are running through the streets, wrecking havoc. In the midst of this hellish awakening, Finn is greeted with the one gift bestowed to humanity in this dark hour:
[...Assessing life experience…] 
[Assessment Complete] 
[Name: Finn Thorne] 
[Age: 20] 
[Designated Class: Assassin] 
[Starting Level: 5] 
[A [Legacy System] has been bestowed to you for your accomplishments within Avalon.]
[Assimilation System Awakened.] 
In this twisted turn, as the world as it was once known is gone with the arrival of magic and monsters, the remnants of humanity must level up if they wish to survive. 
Finn is left in this dark, hopeless apocalypse, using his own experience from Avalon Online to best survive what seems to be an impossible task.

--

Daily updates at 9 AM PST 

Support for bonus chapters

Level-Up Apocalypse: Surviving With The Assimilation System

Finn grabbed a hold of the knight's hoodie, yanking him back as quickly as he could. In Jasper's view, the edge of the knife greeted his eyeball, coming just inches from giving him a more personal greeting.

As soon as the knight was pulled out of harm's way, Charlotte intercepted with a slash of her fire-engulfed blade.

The motion of the enchanted sword sent forth a brilliant arc that spewed with heat before igniting into a set of small explosions. All it did was force the killer to slide back, though right into the crosshairs of Nikko:

Compartments opened in the steel limbs of the sentry, firing off bullets with bright-blue tracers. For a moment, Finn ducked himself behind Jasper's shield, pulling Charlotte over as well, though none of the bullets came their way.

Dreamwalk To Survive