Terrifying Doomsday: I Can Upgrade Infinitely

[Welcome to the Horror Doomsday Game, hello everyone, I am System King! [This game belonging to Deep Sea Middle School is about to begin, warm reminder! [1. The entire Shenhai Middle School has entered the game time and space. Don't try to escape from the campus, you will get lost! [2. Players participating in the game are selected by a random system, please be prepared at any time. 3. Hunt monsters as much as possible, improve your strength level, accumulate points, and choose a career, which will make you stronger. [4. Please don't trust others easily. It's not just your enemies who are malicious to you. 5. You only have one life, living is more important than anything else!