Death March kara Hajimaru Isekai Kyousoukyok...
Ichiro Suzuki is a 29-year old gaming programmer who was tasked with fixing several bugs in two MMORPGs his company is preparing for publication. However, he becomes extremely worn out as he is working during the weekend. After taking a nap, he mysteriously wakes up in another fantasy RPG world as a 15-year old named Satou Pendragon, a nickname he uses while running beta tests, and with what looks like the menu screen of the game he was working on appearing before his inner eye.
However, before he could grasp his current situation, an army of lizardmen ambush him and launches an all-out attack on him. In desperation, he uses all three of his special 'Meteor Rain' attack options at once and wipes them all out, in Manga however, he accidentally killed a God, while in Anime, he mastered the ability and used it again. As a result, his level jumps from 1 to 310, maximizing his stats immensely. With no way to return to reality, and as a high-leveled adventurer armed with a myriad of different physical, cognitive and magical abilities and weapons but he hid it, he sets out to uncover the secrets of this new world, earning the trust and affection of many people in the process.