Single-player games like Relentless Frontier
Below are 12 single-player Steam games similar to Relentless Frontier, 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 Relentless Frontier page.
Ranked picks
- 1
Mekkablood: Quarry Assault
Single-player alternative to Relentless Frontier — playable solo, no multiplayer required. Shares Action and Indie with Relentless Frontier.
The Year is 2082. You play the role of Bill, a grizzled, and extremely hairy robojockey. It's up to you to take the reigns of Bill's Mekk, with your friend Rusty, to get your revenge against TorxCorp, who's trying to steal your mining claim.
- 2
LvL50
Single-player alternative to Relentless Frontier — playable solo, no multiplayer required. Shares Action and Indie with Relentless Frontier.
KILL. DIE. LEARN. LvL50 is a fast-paced first-person shooter where you need to beat 50 levels, in a row, without getting hit. Can you become a master and escape the lab?
- 3
Off Axis
Single-player alternative to Relentless Frontier — playable solo, no multiplayer required. Shares Action and Indie with Relentless Frontier.
An action-packed sci-fi FPS set aboard a massive spaceship, where unstable gravity changes the way you fight and the environment becomes a weapon against your enemies.
- 4
1000-Carat Organs
Single-player alternative to Relentless Frontier — playable solo, no multiplayer required. Shares Action and Indie with Relentless Frontier.
An FPS that combines realistic controls with simple anime-style graphics. Play as a special government agent and use a range of firearms to take down mutants and illegal organizations.
- 5
It Could Be Worse
Single-player alternative to Relentless Frontier — playable solo, no multiplayer required. Shares Action and Indie with Relentless Frontier.
Speed bends time. Build momentum with weapons designed for movement to slow the world around you and tear through enemies at superhuman velocity.
- 6
Selaco
Single-player alternative to Relentless Frontier — playable solo, no multiplayer required. Shares Action and Indie with Relentless Frontier.
Selaco is a brand new original shooter inspired by classics, featuring thrilling action set pieces, destructibility, smart enemies and a fleshed out story taking place within an immersive game world.
- 7
RIFTFALL
Single-player alternative to Relentless Frontier — playable solo, no multiplayer required. Shares Action and Indie with Relentless Frontier.
HELL DIDN'T CLOSE. IT EVOLVED. A fast, brutal retro indie FPS raised on the 90s classics: a 20-level campaign, 4 heavy weapons with alt-fires, 21 enemy types, colossal bosses, AI squadmates, permanent upgrades, skull keys and secrets. Completely free, no in-game purchases. Epic soundtrack!
- 8
CTRLSINK
Single-player alternative to Relentless Frontier — playable solo, no multiplayer required. Shares Action and Indie with Relentless Frontier.
A submerged post-apocalyptic retro-style FPS set in a world swallowed by the ocean after a human/AI war. Blast through flooded facilities, battle corrupted machines, explore radioactive ruins, and uncover the last buried secrets of humanity’s collapse.
- 9
Quake
Single-player alternative to Relentless Frontier — playable solo, no multiplayer required. Shares Action with Relentless Frontier.
Developed by the award-winning id Software, Quake® is the ground-breaking, original dark fantasy first-person shooter that inspires today’s retro-style FPS games. With Quake (Enhanced), experience the authentic, updated, and visually enhanced version of the original.
- 10
Quake II
Single-player alternative to Relentless Frontier — playable solo, no multiplayer required. Shares Action with Relentless Frontier.
You are humanity’s last hope to stop the Strogg, a hostile alien race waging war against Earth. Play this military sci-fi FPS, now upgraded for modern platforms with improved visuals, new campaign content, online multiplayer/co-op, and more.
- 11
HeXen II
Single-player alternative to Relentless Frontier — playable solo, no multiplayer required. Shares Action with Relentless Frontier.
The Four Horsemen of the Apocalypse lurk in the shadows before you. They are Death, Pestilence, Famine, and War. They are the root of all that is evil, but the least of your worries. The last of the three Serpent Riders yet lives.
- 12
DOOM
Single-player alternative to Relentless Frontier — playable solo, no multiplayer required. Shares Action with Relentless Frontier.
Now includes all three premium DLC packs (Unto the Evil, Hell Followed, and Bloodfall), maps, modes, and weapons, as well as all feature updates including Arcade Mode, Photo Mode, and the latest Update 6.66, which brings further multiplayer improvements as well as revamps multiplayer progression.