Single-player games like The Harbinger of the Deep
Below are 9 single-player Steam games similar to The Harbinger of the Deep, 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 The Harbinger of the Deep page.
Ranked picks
- 1
Crusator
Single-player alternative to The Harbinger of the Deep — playable solo, no multiplayer required. Shares Action and Adventure with The Harbinger of the Deep.
CRUSATOR is a fast-paced, twin-stick shooter about robot-transformer. Shot'n'Ram enemies. Nothing can stop you! Except low level battery.
- 2
Master Π
Single-player alternative to The Harbinger of the Deep — playable solo, no multiplayer required. Shares Action and Adventure with The Harbinger of the Deep.
A fast-paced action shooter where dual-pistol combat, resource-driven abilities, and rhythm-based boss encounters combine into a skill-focused combat experience set in a post-apocalyptic world.
- 3
Earl vs. the Mutants
Single-player alternative to The Harbinger of the Deep — playable solo, no multiplayer required. Shares Action and Adventure with The Harbinger of the Deep.
Save humanity in a mutant-ridden apocalypse! Dive headfirst into Earl vs. the Mutants, a high-octane top-down survival action-roguelite set in the aftermath of a nuclear apocalypse.
- 4
N.E.O.N. HORIZON
Single-player alternative to The Harbinger of the Deep — playable solo, no multiplayer required. Shares Action and Adventure with The Harbinger of the Deep.
Survive 100 perilous waves in a sci-fi roguelite shooter where every decision transforms your ship. Upgrade its systems, discover powerful relics, create unique synergies, and uncover the mystery awaiting you at Horizon.
- 5
Gearomancer
Single-player alternative to The Harbinger of the Deep — playable solo, no multiplayer required. Shares Action with The Harbinger of the Deep.
Step into the mechanical apocalypse in Gearomancer, a fast-paced twin-stick action roguelite. Play as elite V.E.R.T.E.X. agents to dodge brutal bullet hells and obliterate elemental horrors. Harvest Arcane crystals, forge permanent upgrades at your hub, and die to return stronger than ever.
- 6
Shmup!
Single-player alternative to The Harbinger of the Deep — playable solo, no multiplayer required. Shares Action with The Harbinger of the Deep.
Arcade-style bullet hell action! 3 ships, 5 special weapons, and screen-clearing bombs. Conquer 5 intense stages with dynamic difficulty—then compete for high scores on online leaderboards.
- 7
Vanisha
Single-player alternative to The Harbinger of the Deep — playable solo, no multiplayer required. Shares Action with The Harbinger of the Deep.
A progression-driven twin-stick shooter. Customize ships, combine powerful chips, and forge unique builds through a massive talent tree as you race to stop the Anomaly.
- 8
Cells of Division
Single-player alternative to The Harbinger of the Deep — playable solo, no multiplayer required. Shares Action and Adventure with The Harbinger of the Deep.
Cells of Division is a top-down bullet hell roguelike. Fight with past-run clones (up to 6 allies), mix ~100 items, and defeat 50+ bosses. Destroy viruses and defend the immune system!
- 9
Deep Dark Wrath
Single-player alternative to The Harbinger of the Deep — playable solo, no multiplayer required. Shares Action and Adventure with The Harbinger of the Deep.
Plunder for Points, Collect and Strengthen yourself with Enchanted Cards, Survive countless enemies, Venture deep to find their source, Escape, and Quell the Deep Dark Wrath!