Good 3D engine for a game like this.

[WindScar]

The game looks like ragnarok, where the structures are 3D but it is tiled and uses 2D sprites all around. It will have some kind of collision checking but just for boxes.

In other words I want something very simple =)

[kruseborn]

Write your own engine, its not so complicated and then you can really control everything that you gonna do. Normal collision detection and loading 3d models will only take a few days or just 1 day to get running.

[mmakrzem]

Have a look at my own game engine on the website below. If you want to create your own engine that is.