I Became an Evolving Space Monster

Read manhwa I Became an Evolving Space Monster / Evolution: Road to Space Monster / 진화하는 우주괴물이 되었다
The protagonist wakes up to find that they are reborn as an alien creature inside an SF survival video game. In order to survive in a strange, foreign world, they must use their knowledge of the game and evolve until the final stage. Through this evolution, the protagonist becomes a terrifying creature that everyone fears.