Lode Runner is the classic Apple ][ gold-gathering platformer. This is the original monochrome Mac port from 1984, which still works except that clicking in the main window crashes the game under some OS versions (but you can still play with keyboard control - IJKL to move, UO or SF to dig, D or any other non-playing key to stop). Also includes the levels from 'Championship Lode Runner' and 'Revenge of Lode Runner', which are much more challenging.
Level hint guide can be found at: http://www.reocities.com/SoHo/Exhibit/2762/loderunner/main.htm
When running on later 68k and/or PowerPC based Macintosh models, keep mouse inside game window. v1.2 image in download is MFS and can be loaded on 128k or 512k Macs running any System version. v1.0 image is HFS.