The River Collection was released by The Adventure Workshop and contains the
following games:

RIVERCOA.DSK - Bounty Hunter, Davy Jones Locker, Into the Mystic, The Miser
RIVERCOB.DSK - Treasure Island

Type |CPM to load the games. Note that this compilation uses CP/M Plus, so you
will need to use a machine or emulator which can run CP/M Plus.