What sets are these pieces from, rock platforms and walls with large cannons I think I have a couple of sets I'm trying to put together for my son that were my brother's when he was young. Probably from around year 2010 or earlier. Looks like a black castle or dungeon. Also with gargoyles and broken wire cells. Also have large rock platforms and rock walls. Please help. I've searched and can't even find the pieces online.
It looks like you have some Mega Bloks sets.

I can't say for sure if these are sets you have, but I found similar pieces in these sets:

Dragons Battle Gate



Portal of Fire



I don't know of any resources for non-LEGO instructions.