Single-player games like Nienix: Cosmic Warfare
Below are 13 single-player Steam games similar to Nienix: Cosmic Warfare, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Nienix: Cosmic Warfare page.
Ranked picks
- 1
EVERSPACE™ 2
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and Adventure with Nienix: Cosmic Warfare.
EVERSPACE 2 is a fast-paced single-player spaceship shooter with exploration in space and on planets, tons of loot, RPG elements, mining, and crafting. Experience an exciting sci-fi story set in a vivid, handcrafted open world full of secrets, puzzles, and perils.
- 2
Drox Operative 2
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and Indie with Nienix: Cosmic Warfare.
Drox Operative 2 is a starship action RPG with warring alien races, fierce space battles, a dynamic, evolving galaxy, and co-op multiplayer for Windows and Linux.
- 3
Astroloot
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and Indie with Nienix: Cosmic Warfare.
Loot, level up, and obliterate everything in your path. Astroloot is a sci-fi bullet heaven with deep ARPG systems, featuring a massive skill tree, deterministic crafting, and near-endless build possibilities.
- 4
Star Vortex
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and Indie with Nienix: Cosmic Warfare.
Star Vortex is a fast paced Action-RPG inspired by classics of the genre. Design your ship, fight your way through hostile alien sectors, upgrade as you salvage rare weapons and experiment with different builds until nothing can stand against you.
- 5
Reality Break
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and Indie with Nienix: Cosmic Warfare.
Rewrite the universe! Break reality to change your fate, and use your powers to stop sinister forces from altering existence itself. Discover the origin of your new abilities in a fast-paced ARPG Loot Collection Roguelite where you will bend, break, and change the laws of the universe!
- 6
Star Valor
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and Indie with Nienix: Cosmic Warfare.
Choose your own destiny as you explore an open-world procedurally generated galaxy where anything is possible. Become a miner, a trader, a bounty hunter, a pirate, or perhaps a jack of all trades. Start off small and build your way to the top but remember with every action, comes consequences.
- 7
Killsquad
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and Indie with Nienix: Cosmic Warfare.
Hack and slash? Check. Twin-stick-shooter? Check. 4 player coop to slay hordes of aliens & bosses with your friends? Check. Skills, upgrades, weapons, gears, talismans and more to make you stronger? Check. Wake up, bounty hunter. We have a mission for you. Time to clean up the scum of the galaxy.
- 8
Black Ice
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and Indie with Nienix: Cosmic Warfare.
Hack greedy megacorps to help as many people as you can in a high-agility cyberpunk looter/shooter RPG. Explore neon cyberspace vistas and outmaneuver AIs to customize your hacker OS and weapon combos. Play solo or online co-op with up to 10 people!
- 9
VoidExpanse
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and Indie with Nienix: Cosmic Warfare.
Explore the vast reaches of VoidExpanse -- mine asteroids, upgrade your ship, trade, complete missions, advance your character and survive fast-paced combat with hostile aliens and mercenaries in the rich and exciting Sci-Fi universe of VoidExpanse!
- 10
Path of Exile
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and Indie with Nienix: Cosmic Warfare.
You are an Exile, struggling to survive on the dark continent of Wraeclast, as you fight to earn power that will allow you to exact your revenge against those who wronged you. Path of Exile is an online Action RPG set in a dark fantasy world. The game is completely free and will never be pay-to-win.
- 11
Space Pirates and Zombies
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and Indie with Nienix: Cosmic Warfare.
Explore a randomly generated Galaxy populated with factions, enemies, missions, and items providing you with a unique experience each time you play.
- 12
Diablo® IV
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and Adventure with Nienix: Cosmic Warfare.
Join the fight for Sanctuary in Diablo® IV, the ultimate action RPG adventure. Experience the critically acclaimed campaign and new seasonal content.
- 13
Grim Dawn
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and Indie with Nienix: Cosmic Warfare.
Enter an apocalyptic fantasy world where humanity is on the brink of extinction, iron is valued above gold and trust is hard earned. This ARPG features complex character development, hundreds of unique items, crafting and quests with choice & consequence.