[Game development + action-packed story + Elf Empire + Dreamland development + Magical Steampunk]

The protagonist travels to another world and develops games using the dream world.

Plants vs. Zombies, Stardew Valley, The Elder Scrolls V: Skyrim, League of Legends, Sekiro: Shadows Die Twice, Genshin Impact, GTA: Otherworld Edition, Terraria, SouDak, Mount & Blade, Minecraft, Ark: Survival Evolved, Ghost Valley Eight Desolations

As he created more and more games, various races became immersed in the worlds he created.

One day he looked at the moon

A thought arose in my mind.

How about we transform the moon into a giant login machine?