We are pretty unschooly, eclectic too. But I found a few curriculums that I like and am loosely using.
History Odyssey (which uses Story of the World and Usborne books) is great for history. It is more secular than the Story of the World curriculum and on a slightly different (more secular) time line too. We are enjoying it. We have the resources and are using it loosely - love love love the Usborne Word History and Ancient History encyclopedias!! We read, watch some documentaries/movies, do lots of fun hands on stuff - we spent about 3 weeks on dinosaurs and the last 2 on prehistoric mammals and man. having lots and lots of fun with it and just moving along at our own pace.
REAL Science Odyssey Life Science - we are liking this. It is the human body and then the classifications of the animal kingdom. Lots of cool experiments and activities all neatly compiled in one place

Literature - we just use our books from HO and SO, and all the various books we read together... nothing formal there.
As for games - we splurge $10 a month for
www.cosmeo.com - it is the best investment ever!! It is put together by Discovery Channel, History Channel and ANimal Planet. Lots of awesome videos and articles plus a ton of super fun "brain games" DS is addicted to this site - we do a pretty large portion of school time thru this site. Try the free trial - if you do, check out the pendemonium vids/games. they are a HUGE hit over here right now
