Fortress is an isometric scrolling shooter written by Mat Newman, developed by Amcon and released by Pace Software for the BBC Micro home computer in 1984.

Fortress is a scrolling shooter in which the player maneuvers a starfighter along an alley-like terrain in an isometric perspective, moving toward the top right of the screen.

The player must avoid enemy gun turrets, rocket pits, and fighters, as well as deal with additional problems of navigating over and through walls with force fields.

He learned how to optimize the graphics and input of the machine by disassembling the code for Planetoid and studying a BBC Micro circuit diagram.

[2] He then wrote several commercial titles including Alien Swirl for Program Power, Space Hi-way for Amcon, and Ewgeebez for Software Projects.

He proclaimed, "From the variety in enemy types and the mix between dodging projectiles and dogfighting craft, to collecting enough fuel to progress and the game's smart use of height to traverse the environment – Fortress handles everything that Zaxxon does, and extremely well, in spite of the BBC Micro's low system power."