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:
- Fortress Valis - Salamander, Life Force
- Demos - Gradius II
- Pinwall - Parodius Da!
- Crazy Core - Gokujō Parodius!
- Disrupt - Gradius III, Jikkyō Oshaberi Parodius, Sexy Parodius
- Mr. Goldfish's Selling Fortress - Jikkyō Oshaberi Parodius, Sexy Parodius
- Cliff Core - Gradius Galaxies
- Gunner Wall - Gradius Gaiden, Otomedius Excellent
- 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