Unminable rock

Tell that to Mojang!

The idea is interesting. I want the game to have more variety, but you need to try not to overcomplicate it.

Tell that to Mojang!

So you're suggesting the dumbest idea possible? :( Why??

Yes it is dumb, but we escape the real world for a little fantasy.

I will concede to having very difficult to mine from unmineable.

I wanted a way to put players off from mining into an enemy base.

Undermining enemy fortifications is one of the oldest tasks for true engineers ;)

To the problem - reinforced concrete wall, undermines with mines and detectors... Just like in the Middle Ages...

And you can't help it... A space engineer will do exactly what a medieval engineer did - dig a hole and when he hits an "insurmountable obstacle" he builds a massive charge - and detonates it.

From experience, the best way to stop people from mining in to a base is to mine it out yourself first. Excavating large cavities under and around your base and putting turrets in them makes it significantly more difficult for your average under-mining grinder-monkey to get in that way.

Tael - this is actually building "counter-undermines" at a higher level. The medieval engineer applauds.

A novel concept, but the only reason I can think of for having this would be to counteract players mining out excessive amounts of material in ways that lag a server. Obviously this isn't something that happens in every game, especially with voxel-regeneration, but it wouldn't be the first time I've dug an underground maze leading in to a massive cavern (a 300m x 300m cylinder) a few km underground (I didn't know missing voxel lagged at the time). Of course if Keen can keep it from lagging like it does in SE1 then it would probably be unnecessary.