Dismissed Mouse Guard on its premise alone (playing with rats? Wtf ?? ), so I dont know how it looks like. Though if the description is accurate, its more a "hardcore survival sim" or something, which sounds cool to me.
I hope it doesnt have abstract mechanics like fate points, etc. And I hope its also not a "storygame" on dungeons.
Edit:
Reading a bit more, it seems a "very low magic" kind of game. No "create food" or "heal wounds" at all. Fuck, this is giving me a fighting fantasy "Deathtrap Dungeon" vine, that grim exploration where even mundane objects like a rope or a torch gets immensely important.