Single-player games like Nienix: Cosmic Warfare
Below are 15 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
AntiShatter
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and RPG with Nienix: Cosmic Warfare.
Pilot your own Spaceship in this Sci-fi Space Shooter game! Shoot Asteroids to collect Antimatter, Metals, and Pickups! Use the Metals and Antimatter you collect to upgrade your Spaceship! Level up to unlock stronger Metal tiers to collect, craft or buy Parts from the Store! Survive endless Space!
- 2
Operation: Black Genesis - The Immortal Trials
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and Adventure with Nienix: Cosmic Warfare.
top-down co-op survival horror game where players deploy into deadly Quarantined Zones, fight mutated experiments, and extract with everything you can carry—because if you die, you lose it all.
- 3
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!
- 4
Riftbound Survivors
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and Indie with Nienix: Cosmic Warfare.
Riftbound is a survivor-like bullet heaven focused on spell combinations and massive enemy waves. Defeat thousands of enemies, experiment with elemental chain reactions, and break the game with overlapping status effects. Play solo or in co-op.
- 5
Ark of Loif
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and Indie with Nienix: Cosmic Warfare.
Ark of Loif, Hardcore Action Shooter – RPG.
- 6
Tomo: Endless Blue
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and Adventure with Nienix: Cosmic Warfare.
Tomo: Endless Blue, a Monster-Taming ARPG set in a Voxel Open World. Set sail through the Endless Blue, an ocean realm home to mysterious creatures called Tomo. Team up to fight, build homes with friends, or craft wild vehicles to explore procedurally generated islands, villages and tales.
- 7
Relic Hunters Legend
Single-player alternative to Nienix: Cosmic Warfare — playable solo, no multiplayer required. Shares Action and Indie with Nienix: Cosmic Warfare.
A Top-Down Shooter/Looter RPG with a touching story inspired by JRPG classics. Shoot enemies, get loot, and customize your characters. Multiple endgame systems and over 100 hours of play await you solo or up to 4-player co-op!
- 8
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.
- 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
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.
- 12
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.
- 13
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.
- 14
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.
- 15
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.