Here is a wonderful 3-D arcade shooter. Check where enemies are on the radar then shoot them before they reach you. Great action! Originally published by Sirius Software as a cartridge.
This game is in PRG format for the PAL, 32k VIC-20. Either set all (1-2-3-5) expansion blocks ON either on the physical VIC-20 or in the WinVice emulator before loading it.
With WinVICE, it will be as easy as dragging the PRG file onto the emulator window just after setting the memory expansion correctly and resetting with Alt-R.