my idea for a game mode was fairly simple, yet complex. there needs to be a VERY tall build limit for it to work, but the horizontal size can be more limited. The idea: there is a randomly generated world which fills up to the normal build height (256 blocks) or the same world reset (copied and replaced) every (insert chosen amount of time here) except up to the 256th block. anything above that is not reset, and will be where you make your base. I also recommend to either warn people that they may be suffocated, or you could make people teleport to the surface. (or lowest safe place) bases: obviously skybases/boxes and vaults would be the only viable option. economy: add a fairly low chance of spawners dropping when mined. make /ah and /shop well, there you go. I hope you enjoyed reading this post, and I hope this is used as a game.
I don't quite get the idea of this gamemode, new gamemodes almost always require a lot of custom plugins and such though. So unless it's really popular and full of potential, there is a small chance it will be added in the future. Thank you for leaving your suggestions though, we appreciate it.
thanks for this. nice to see people doing their bit talking to the community. also, I think that a factions based economy would be nice to see if there are groups being competitive over spawners and high value items. Also, you could make every enchantments level 1 from the table (if the server determines the enchants) so there are more high worth items to work towards. also, you could make the anvils allow you to have combinations with the same cost as the first combination and have a higher maximum enchant level.