Piranhas were a mainly Swiss demo group.
- Into the second half of the year, the group was experiencing severe internal problems. They lost their swiss sysop TMA ('THE LAST HOPE', ex Slimebyte, new 05/90) and several members were kicked or left.
- WEST (Germany, 09/90)
- TEMPLE OF DESTRUCTION (Italy, 09/90)
- GRATEFUL DEATH (Switzerland, 09/90)