Summary
This series is about a man by the name of seonghoon, who is transported into a room filled with 3 other people, they are asked to complete a mission, but it is here that our protagonists intentions become clear

Spoiler, click to view

Instead of participating in the mission he chose the second option of killing all the others within the room to proceed into the story's world

in the story's world he tries to become the strongest as fast as possible by partaking in missions to increase his stats. In this world there is a stats window akin to that in something like solo leveling or Omniscient Readers viewpoint, however therenis no leveling up system, instead there is just stats, skills, jobs(swordsman, mage, etc) and items. This simplifies the story slightly. There are many "NPC's" created by the gods which can sell items like skill books or items or even buy items in return for a set amount of 'gild' which is this storys currency. Everything is going right for our protagonist as he finds companions and friends, until an S Grade mission is forced on all residents the story's world...

Review
This series has a creative idea with the implementation of different gods, mythologies and worlds, however it can get messy at times as a result of this. It also is creative in its implementation of skills, stats and items however i have only one problem with skills. Since they are so easy to obtain through "NPC's" it becomes hard to track ehat skills our protagonist has and it makes the story slightly sloppy.
I have one problem with our protagonist as well as he doesnt seem to have much reason for becoming a villian, since his motives arent clear and he doesnt have a defined reason for being a villian, it becomes hard to root for him at times. It also makes him seem slightly scummy at times.
The side characters are decent such as Elly, the only problem with Elly is that she is also evil for the sake of being evil at times. It makes her seem bland and one-dimensional at times.
The story incorporates its own unique ways of executing missions and such.
Tbe art is quite good, its mothing exceptional in the world of manwha, however there are a few cool panels that i have saved and there are a good few interesting character designs. I like the artists style, overall the art is decent.

Conclusion
I would definitely recommend this manwha if you've finsihed reading other great works like Omniscient Readers viewpoint. Good story, decent art and unique ideas

Similar Manhwa
One very similar manhwa is 'The Live' although the main character is not evil in this, the setting is similar and so are many of the characters.