For game books, I'd second the reccomendation for
Second World Sourcebook and
Chaositech, rip off some
Dragonstar,
Urban Arcana/Dark*Matter.
I'll also add Goodman Games'
X-Crawl, Perpetrated Press's products
Arsenal and
Factory, and the incredibly rich settings of
Space:1889 and
RIFTS.
Space:1889 is a Sci-fi RPG set in a Victorian era (similar games include
Alternity: For Faerie Queen and Country and
Etherscope) as envisioned by Wells & Verne. I've run supers & fantasy campaigns in the setting, but using different games (HERO or D&D).
RIFTS is one of the most inspired FRPGs out there...I've used it several times. Sometimes, I've even used it with its own mechanics! Usually, however, I run it in HERO or some other system thats less clunky.
For further inspiration, I'd reccomend:
1) Harry Turtledove's
Darkness novels ( http://en.wikipedia.org/wiki/Harry_Turtledove's_Darkness )- a whopping 6 books each over 500 pages, is a fantasy world going through its own version of WW2. You'll find magical stasis boxes (freezers), crystals (wireless radios), troops carrying rods that fire bolts of pure magical energy (analogs of firearms), great, armored land beasts mounting larger versions of those rods (like tanks) and even riders astride barely tamed dragons who breathe cinnabar & coal fueled fire (the fighters & bombers of the world).
Larry Niven and Steven Barnes'
Dream Park Trilogy (
http://en.wikipedia.org/wiki/Dream_Park )- a world similar to ours, only where LARPing is a high-dollar spectator sport with pro-ams, all-star games & 'superbowls" of its own. (There is an R.Talsorian Games RPG based on the book.) Think of a LARP fantasy version of
Westworld and
Futureworld and you're on the right track. While there are similarities between this concept and the X-Crawl game, I know X-Crawl's creator seems to be genuinely unaware of the books or the movies.
For movies, see if you can catch
Cast a Deadly Spell and its sequel
Witch Hunt (
http://en.wikipedia.org/wiki/Cast_a_Deadly_Spell ). The setting is a quasi-Lovecraftian America of the 1940's-50s.