Din's Curse is a single player and co-op multiplayer action RPG with 141 class combinations, infinite number of dynamically generated towns, real consequences, and a dynamic, evolving world. 

In the Din's Curse demo, you can get a taste of the dynamic and ever changing world. There is no time limit but it does limit everything to around level 6. The demos are about 135 MB (Linux 105 MB).  You can see the minimum and recommended System Specs here. Note: this demo has content from both Din's Curse and the Demon War expansion (Linux DC only).