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Game · Puzzle, board & word games

Serious Shooter

3D FPS approved by Uncle Sam.

  • Completely free
  • Linux
  • Open source

At a glance

Serious Shooter is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (GPL-2.0) is a copyleft open source licence: you may use, study, modify and redistribute it, including commercially; modified versions must keep the same licence.

Strengths

  • Open source code
  • Commercial use allowed

About

25 Different Enemies, 3 Weapons, GOD MODE! ... and two secret hidden weapons bound to two keys ;) Mouse locks when you click on the window, press ESCAPE to unlock the mouse. W,A,S,D / Arrow Keys = Move L-SHIFT / R-CTRL = Sprint Left Click = Shoot Right Click = Zoom Mouse Scroll = Change Weapon

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Last technical check: 8 November 2026
  • Description from Flathub — AppStream (Flathub)

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