Games like Codename: Outbreak

Helldivers is a top-down shooter game with intense battlefield chaos. Players work together in a co-op setting to complete objectives and defeat enemy forces across procedurally generated levels. With a wide range of customizable weapons, upgrades, and difficultly levels, Helldivers offers a challenging and engaging experience for up to four players.

Fractured Space is a 5-v-5 team-based Science Fiction Shooter game with fantastic mechanics and perfect graphics. Players control massive capital ships to capture mines, bases, and ultimately the enemy team's home in multiplayer or co-op single-player modes. However, the game can be very grinding and buggy at times. The game's description states that it combines the intensity of a shooter with deep tactical decision making across five sectors.

"Metal Drift" is a fast-paced multiplayer game set in a futuristic arena, where players control high-powered hover tanks and compete in team-based combat. With 5 distinct arenas and 56 possible weapon/upgrade combinations, players can employ different strategies and tactics to outmaneuver and outshoot their opponents. As players level up, they can unlock new ranks, weapons, and upgrades for even more diverse gameplay. Persistent stat tracking and leaderboards encourage players to hone their skills and climb the ranks.

"Earthfall is a Science Fiction Shooter game with single-player and multiplayer co-op modes for up to 4 players. Battle an extraterrestrial invasion in the Pacific Northwest using futuristic weaponry and deployable barricades. Experience tense, procedurally generated gameplay and a well-crafted story across 15 levels."

"PULSAR: Lost Colony" is a sci-fi cooperative game where players take on roles such as captain, pilot, engineer, and weapons specialist to operate a space ship and complete missions. The game supports both single-player and multiplayer modes, with up to five players able to join forces in online play. Players will encounter various alien species, challenging space environments, and must manage resources and make strategic decisions to survive.

In "Level Zero: Extraction," players experience a multiplayer extraction horror game, where they can choose to be an elite PMC mercenary, extracting valuable loot while facing off against other players and PvE hazards, or a formidable alien monster, hunting the humans. The game features intense gunfights, customizable weapons, and a melee combat system. Cooperative gameplay with up to 2 teammates is supported.

Discover Warhammer 40,000: Space Marine 2 on the official PlayStation website. Check out trailers for this sci-fi action game, playable solo or in multiplayer PvP or PvE, as well as screenshots, gameplay features and more.

Interstellar Marines is a tactical sci-fi First Person Simulator, inspired by movies like Aliens and games like Half-Life. It offers singleplayer and co-op/PvP gameplay, with dynamic environments and non-scripted AI. The game aims to evolve the FPS genre with its blend of sci-fi, role-playing, and military realism.

"The Ascent is a co-op action-shooter RPG set in the cyberpunk world of Veles. Plunged into a solo or group adventure, players must navigate the aftermath of their employer's collapse, battling foes and unraveling a conspiracy in a struggle for survival and power."

Dead Space 3 is a horror shooter game that offers both single-player and co-op modes. In the game, Isaac Clarke and soldier John Carver team up to stop the Necromorphs on the icy planet of Tau Volantis, where they will face new enemies and challenges. The co-op mode provides exclusive story elements and battle strategies, making the experience different from the single-player campaign.