This has actually been mentioned in another thread on these forums. This game is something of a mash-up, created using elements inspired by both d20 and Rolemaster.
It has Spell Paths, instead of Spell Lists, but the Spell Paths only go up to 20th level. The attack tables and critical tables sort of remind of those from RMU, but these were released well in advance of RMU, so it almost makes it look like RMU copied Darker Dungeons in this respect....
Overall, it is an interesting game., I think...
