I used to play a lot of Hardcore Factions on Minecraft. The format of HCF is that the world is relatively open, but players can start "factions" and invite other players to join. The owner of each faction could then claim "chunks" (16 by 16 plots of land from bedrock to the build limit) for the faction. This would mean that only members of the faction could destroy or place blocks there. The goal was to raid other factions bases, and try to amass the largest fortune of diamonds and enchanted armor, that you could then use to have high-profile duels at spawn. The more people you had in your faction, the more land you could claim, but also the higher the chance was that someone you recruited would actually be an agent of a different faction, or a lone wolf looking to steal your stuff and hide it in their personal vault.
My classmates and I would start factions together, and we did lots of raids of other factions bases, but since we where 11-13 years old at the time there was all sorts of social drama that would play out in minecraft. We had a hard time staying united as a class. When I sold some kid oregano and told him it was pot, you better believe that I woke up the next day to find my faction base blown to high heaven. Same when I made out with some other kids "girlfriend".
Now, there where a variety of tools that we could use to get a competitive advantage in this server. The most obvious one is what are called TNT cannons. Since you couldn't break blocks in other factions territory, the most common way to get into a completely enclosed base from the outside was to use TNT to launch other TNT into their territory. Knowledge of how to build TNT cannons was a very useful skill, and people who were particularly good at it where highly sought after as faction members. There where a number of preventative measures that one could take to keep their base from getting raided by a TNT cannon . If you where to cover your base with water, TNT would not destroy the blocks making up your wall. However, these kinds of bases could still be penetrated using techniques such as "lava monstering" and the use of a "sand cannon." Both offensive and defensive considerations related to the physical construction and penetration of bases where very important if you where to successfully carry out raids, and prevent your own base from being raided.
Another way of going about raids had less to do with physical penetration, and more to do with social engineering. If you could get one of your faction members to pretend to defect and join an opposing faction, then they could break the walls of a base and let your faction in. This method was more effective and expedient, but took careful planning and required that we get over our divisions as a class for the purpose of raiding opposing bases.
Another way to gain an advantage was to make edits to your minecraft client which would allow you to see through walls and gain advantages in combat. This was dubbed "hacking" and was against the rules on the server. However, lots of people did it, and many of us got away with it. I used many of these exploits, and was well aware that others in good standing on the server also used them. There where precautions I had to take in order to prevent the server admins from learning that I was using hacks though. I had to be very careful about who I told about these hacks, and who I used them in front of. If I was going to kill someone with autoclicker and an aimbot (which was nearly an instant kill in those days) I would need to sneak up behind them so that they would not see my user tag.
Eventually, I became a moderator on this server, and I learned that there was a degree of nepotism and corruption in the server's administration. Members of the most powerful factions had personal relationships with server moderators and admins, and these mods would look the other way when members of these factions broke the server rules. My position as a moderator allowed me to join one of the more powerful factions.
This left me with a choice. Was I going to stay in this faction and let my classmates fend for themselves in light of what I had learned. For a while I thought that is exactly what I would do. However, it got a bit lonely playing with people I could only talk to through skype.
I missed raiding with my friends. So, one day after learning the coordinates for the personal base of one of the most wealthy and powerful players on this server (the owner of the faction I had joined) I decided to act. I did not have permissions to destroy blocks in this base, but I did have the coordinates, and one of my classmates knew how to build a high-powered enough combination TNT sand cannon to get through the walls. I hit up my classmates, and although some of us had beef with one another, no one was going to miss out on this raid. We managed to overcome our divisions, and unite as a class against a common enemy. We all got into a skype call together, and I gave them the coordinates of the base. I hung out inside the base so I could warn them to crouch and hide their name tags if the player we were raiding came online.
Over the course of several hours, my comrades built a combination TNT-sand cannon and slowly blew a hole in the many layered walls of the base. Just when they had gotten through, the owner of the base came online. He instantly realized what was going on, kicked me from the faction, and brought in several other members of his faction to help defend the base. By this time though, we where already in. A battle ensued, and many players on both sides where using hacked clients. I only made it out with one chest full on diamond armor, but many of my comrades had better hauls.
I was demoted from my moderator position soon after, but it was all worth it. I had learned a new sense of solidarity, and I treated my classmates better going forward. I no longer sought moderator status on the server, opting instead to try and raid as many admin-connected bases as I could. The only reason we were able to pull off this raid was because we used all of the tactics available to us. We used social engineering, we used the most powerful cannons you can build in the game, and we violated the servers rules by using hacked clients.