Here is a low poly wooden treasure chest, it’s made for BGE. I’ve done such more complex, but this one turned out to be the hardest model I’ve ever done, it’s so weird.
And 4th pic
might wanna mess with the materials a bit. it kinda looks like all materials are the same here 
model is good otherwise
There is a total of 4 textures, the strap on top I wanted to be leather, but it’s part of the box. I’d have to flatten it and then add a separate object, but didn’t feel like doing that.
thats a very clean treasure chest 
The model is so strange. Hi-poly things on the side and low poly (very low poly) box. Materials are not good too. Everything is “plastic” 
Sorry you feel it’s a bad model, but it’s a gaming model, which it has to be very low poly in order to not lag the engine. BGE has a bad lag when you deal with high poly content.