Infinite Troop Spawning, Starting with StarCraft

The opening chapters are transitional. You can start reading from Chapter 7. The protagonist won't get much screen time. The story focuses on the troops fighting across different worlds and making up for past regrets, while staying as faithful as possible to each world's lore. Zombie apocalypse? Let me show you what a grenade launcher can do! A swarm of insects? Your horde takes casualties every second, while my good brothers are endless! Ever since Zhang Xiaodong obtained the System, the foreign races across the Myriad Worlds have been in for a rough time. Good brothers from StarCraft, Space Marines from Warhammer, with League of Legends, Overwatch, Devil May Cry, and other worlds joining later. Completed worlds: StarCraft, Overwatch, Resident Evil, Spirit Cage. Worlds to come: Halo: Reach, Diablo III, League of Legends, and more. Feel free to comment with worlds you'd like to see. The author will decide based on the circumstances. P.S. This book has nothing to do with Rusted Warfare. It just borrows a few game mechanics.