Gunwalls are a stationary type of boss, which usually attack by firing laser turrets and creating duckers. They are usually found on the last stage almost midway of the level and each has various degrees of difficulty. The first appearance of a gunwall was in Salamander.
The following is a list of all the gunwalls in the Gradius games:
- Center Core - Salamander, Life Force
- Demos - Gradius II
- Crazy Core - Gokujō Parodius!
- Disrupt - Gradius III, Jikkyō Oshaberi Parodius, Sexy Parodius
- Fish Wall - Jikkyō Oshaberi Parodius, Sexy Parodius
- Cliff Core - Gradius Galaxies
- Gunner Wall - Gradius Gaiden
- Bloody Gate - Gradius IV
- Keeper's Core - Gradius V
- Enigma - Salamander MSX, Gradius Rebirth
- Venom - Nemesis 2, Salamander MSX
- Keeper's Core EX - Gradius: The Interstellar Assault