Tower of God is a great webtoon/manhwa for people who like games with simple rules that lead to complex stategies, small group politics, and action. There's a lot of complex world building and lots of twits which makes the plot diffult to explain, but here's a basic overview. The story follows Baam who grew up in a cave with only a single friend, Rachel. One day Rachel decides to excape the caves by climbing the Tower, so that she can see the stars. Each floor of the Tower has a test (or series of tests) you have to pass in order to advance to the next level. People who reach the top of the tower are rewarded with immense supernatual power and social status. Thus many people attemp to climb it even though the second floor alone has a worse than 50% mortality rate and your chances of reaching the top are on par with winning the lottery. Baam attempts to follow her into the tower, but gets seperated from her and dragged into on of the tower's internal politcal stuggles. ETA- The link at the topic is to the official site, but Batoto also has a very high quality fan translation which is quite a bit a head of the official English version (several hundred chapters vs 11).