I'm going to give the Elder Scrolls a game a go - not particularly from the point of view of the 'Solo/Co-op' Delves system, but that'll be interesting to try out certainly.
Going by reviews I've read, even those lukewarm towards it in general are complimentary about the Delve mechanics...
Personally I'm attracted by the game's apparent 'crunch' and relative complexity.
But they do seem to have made a hash of the core rulebook (and don't appear to be in any rush to put out a fully-corrected PDF version either, rather just a long errata file which you've effectively got to mentally cut and paste yourself - very self-defeating; bizarrely so really).
got some figures coming soon - and somewhat worried about how difficult I'll find the plastics to put together (apparently the resins are more straight-forward)