JoeGKushner
Adventurer
M'eh. Hard to say.
Many games use more than one book. Rolemaster, (both Classic and RMSS), nWod (well, you co do an all mortals game with no assistance for the GM in terms of goodies), GURPS, etc...
On the other hand, some games have an all in one like Warhammer (to a LIMITED degree, the bestiary is almost mandatory) and Call of Cthulhu.
But for players, it's really only a one book investment (unless they want the 'booster' packs.) GMs on the other hand, still get bonned.
Many games use more than one book. Rolemaster, (both Classic and RMSS), nWod (well, you co do an all mortals game with no assistance for the GM in terms of goodies), GURPS, etc...
On the other hand, some games have an all in one like Warhammer (to a LIMITED degree, the bestiary is almost mandatory) and Call of Cthulhu.
But for players, it's really only a one book investment (unless they want the 'booster' packs.) GMs on the other hand, still get bonned.