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Not my thing but wanted to help anyway~ I searched these up, hopefully they help
https://www.mangago.me/read-manga/tower_of_god/
https://www.mangago.me/read-manga/gantz/
https://www.mangago.me/read-manga/doubt_tonogai_yoshiki/
https://www.mangago.me/read-manga/life_is_money/
https://www.mangago.me/read-manga/battle_royale/
https://www.mangago.me/read-manga/deadman_wonderland/
https://www.mangago.me/read-manga/bokurano/
![](https://pic1.mangapicgallery.com/r/avatar/6a/u2200409_50x50.jpg?2)
Here are some lists that have that theme too. Hope it helps!
https://www.mangago.me/home/mangalist/727/
https://www.mangago.me/home/mangalist/554207/
Manga/hwa/hua w like games/exams? Where something is at risk (life, money, etc). (I’ve read Tomodachi game, alice in borderland, qqgk. Sumthin like those?)