Used parellel projections are often :
*Oblique projection : [[Pac-Mania]]yet "Beat Them Up" games (like Double dragon or Renegade) or even few "Shoot them Up"s (Mag Max) do use some kind of this.
*Isometric projection : [[Head Over Heels]]
*Dymetric projection : often when Mode0 is used as the large pixels naturally tend to this.