Tremulous

Unvanquished is a free, open-source first-person strategy game shooter, pitting technologically advanced human soldiers against hordes of highly adaptable aliens. Players can choose from either team, providing for an entirely different experience on both sides, as humans focus on long-range firepower while aliens rely instead on quick movement and stealth. The goal of each match is to destroy the enemy base, preventing members of the opposing team from spawning. Upgrades for both teams are earned by a combination of individual performance and team map control, unlocking access to more powerful weapons and equipment for the humans, and larger, more ferocious forms for the aliens.

Kal Wardin, our hero, is a retired N.O.V.A. veteran summoned once again to don his Mobile Armor Suit in defense of the Colonial Administration forces. Helped by Yelena, his personal AI Agent, Kal must protect humanity's destiny by entering the battlefield against alien invaders while uncovering the mystery behind their sudden attack.

"Inspired by BioShock and System Shock 2, Void Bastards is a revolutionary new strategy-shooter that will test your wits as well as exercise your aim. Can you lead the misfit prisoners of the Void Ark through the derelict spaceships and myriad dangers of the Sargasso Nebula?"

Stand and fight for humanity. This arcade shooter takes place in the year 2022, as the Earth Defense Force fends off an all-out attack by unknown life forms. Become an EDF soldier, battle against endless hordes of immense enemies, and restore peace to the earth.

Akka Arrh is a previously unreleased prototype game created 1982 for the arcade. It saw it's first release in 2022 as part of the the Atari 50: The Anniversary Celebration.

A small, fast-paced game inspired by SEGA’s "Fantasy Zone" series. Play through four worlds in frenetic arcade action as you help the hero, Opbot, evade aliens, enemies, and things from another dimension on their way to freedom!

Warblade is a shareware computer game for Microsoft Windows and OS X, written by Norwegian developer Edgar M. Vigdal. The Windows version runs well on Linux under Wine. It is also available for retail in the App Store for iOS devices (in iPhone/iPod Touch and iPad versions). The game is a 2D space shooter in the vein of the perennial classic Galaga. It is a rewrite and modernization of a popular Amiga shareware game, Deluxe Galaga, which was written by the same author back in the mid-1990s. Where technically possible, the graphics and sounds are respectful to their Amiga origins.

"PlanetSide Arena is a massive-scale, match-based, sci-fi arena shooter that reintroduces players to the revolutionary PlanetSide Franchise - the record-breaking MMOFPS series that redefined all-out planetary warfare. Played solo, in teams of three, or as part of large combat groups, PlanetSide Arena features unique character classes, seasonal progression mechanics, combined arms combat, and a variety of match-based game modes." "Massive Clash This intense large-scale arena pits two sides battling it out for dominance. Choose your side and prepare for a full-on assault in this massive 250 vs 250 battle. Battle Royale Play solos or teams in this jetpack-fueled last mercenary standing sci-fi royal rumble. Customize your loadout, drop into the Arena, loot, and survive."

The Cycle is a Competitive Quest Shooter or PvEvP for insiders. You play as a prospector sent on Fortuna III, a living and unstable planet swarming with hostile alien wildlife. Compete or deal a fragile pact with other Prospectors to claim as many resources as possible.

Explorers have uncovered a previously unknown megacity that is well protected from scouting incursions. When all attempts at penetrating the border are met with destruction, the call goes out to the Ravens, a team of mercenaries hired by the government. As a Raven, you must pilot armored mech suits and destroy enemy weapon systems. A new first-person view allows you to experience a mission from the cockpit. Silent Line: Armored Core also lets you go head-to-head with up to four players or team up for fierce two-on-two battles.

Overcome an ever-expanding threat that might have already seeped too far into the core of humanity itself.