There has been a lot of impressive features on classic computers lately, such as Dragons Lair Laserdisc on the C64 and ZX81. But today we are going to go one step further and mention id's first person hit of DOOM, which also made an unofficial appearance on the Commodore Vic-20 / Commodore VC-20. Certainly an impressive feat considering DOOM was also ported over to the ZX Spectrum 128+!