Deep Rock Galactic is built around four-player squads whose classes — Driller, Gunner, Scout, Engineer — are designed to cover for each other, so playing it alone means leaning on an AI companion drone to fill gaps the game was never balanced to have one player fill. That’s playable, not broken, but it’s also why so many fans of its mining-and-shooting loop end up searching for something built for solo play from the start rather than adapted to it.
Mainline Deep Rock Galactic does ship a genuine solo option: a companion robot named Bosco who mines, fights, carries minerals and offers limited revives, with difficulty auto-balanced for a single player. It works, especially on lower hazard levels, but the class-synergy chaos — a Driller carving tunnels a Gunner can turn into a kill box while a Scout lights the cave and an Engineer builds a platform — is the game’s actual design center, and Bosco is a substitute for three teammates, not a redesign around one player. That gap is what this report is for.
There is no single best solo alternative; the right pick depends on which piece of the loop you miss most. Deep Rock Galactic: Survivor ranks first because it’s the closest official answer — an actual DRG spinoff built single-player only, not retrofitted. Lumencraft ranks second as the strongest non-DRG option, because it’s the only game here that keeps mining, shooting, base building and fully destructible terrain together in one solo-first campaign. Below, we rank eight games on how much of that loop survives without a squad, verified directly against Steam on July 28, 2026.
What “solo-first” actually means here
The games in this report split into two groups that get confused constantly. One group — Deep Rock Galactic: Survivor, UnderMine, SteamWorld Dig 2 — is single-player only by design; there’s no multiplayer mode competing for development attention or pulling the difficulty curve toward group play. The other group — Lumencraft, Core Keeper, Dome Keeper, Volcanoids, Astroneer — supports co-op but was built so the solo campaign or core loop is a complete, first-class experience rather than a scaled-down version of the “real” multiplayer game. Mainline Deep Rock Galactic belongs to neither group: its Bosco-assisted solo mode is a genuine accommodation, but the game’s mission structure, difficulty scaling and class kit are all designed with a full squad as the baseline, which is the specific gap every game in this report fills differently.
Why Lumencraft is the pick when you want all four pieces at once
Most solo mining games trade something away: Deep Rock Galactic: Survivor drops base building and terrain destruction for a faster survivors-like loop; SteamWorld Dig 2 drops shooting and building entirely for pure traversal; Astroneer drops combat almost completely. Lumencraft is the one game here that keeps all four — digging, top-down shooting, base construction, and terrain that’s actually destroyed rather than scripted to look destroyed — inside a campaign built to be finished alone. Its underground caverns are procedurally generated and physically simulated on a modified Godot engine, so blasting a tunnel permanently reshapes the map, with dynamic lighting and flowing lava reacting to what you’ve dug out. The 27-mission campaign, a separate roguelike run mode, and a level editor with Steam Workshop support are all single-player-first; multiplayer exists only as local split-screen or Steam Remote Play, so there’s no online co-op economy competing with the solo campaign for design attention the way there is in Core Keeper or Astroneer. At $19.99 with a smaller but genuinely positive audience — 75% “Mostly Positive” across 1,084 reviews as of July 28, 2026 — it’s the pick for a DRG fan who wants the full loop, not a slice of it, without waiting on friends to log in.
The real trade-off: breadth vs. focus
Once you look past “single-player or not,” the eight picks here split along a second axis — how much of the DRG-style loop each one keeps versus how deep it goes on a smaller slice. Core Keeper and Astroneer go wide: sprawling worlds, crafting, farming and long-term progression, at the cost of DRG’s shooter-driven urgency. Dome Keeper and SteamWorld Dig 2 go narrow and tight, compressing runs into 20-40 minute sessions or a focused platformer with no combat distraction at all. Deep Rock Galactic: Survivor and UnderMine sit in between, keeping combat central but restructuring it around run-based roguelite progression rather than mission objectives. Lumencraft is the outlier that tries to keep breadth (mining, shooting, building, destruction) and a defined campaign structure at the same time, which is exactly why it earns the #2 spot here rather than the top one — DRG: Survivor’s tighter, more focused single-player design is the safer first recommendation, but Lumencraft is the one to reach for once you know you want everything DRG offers, solo.
Where solo mining-and-shooting games are heading
The clearest trend across this list is that “solo mode” is increasingly a first-class design decision rather than an afterthought. Deep Rock Galactic: Survivor exists specifically because Ghost Ship Games recognized enough of its audience wanted the IP without the co-op requirement to justify building a separate, single-player-only game around it rather than patching a bot into the original. Core Keeper and Astroneer both ship solo and co-op as equally supported paths from launch rather than treating multiplayer as the default and solo as a compatibility mode. As the genre matures, expect more mining-and-building games to follow that pattern — designing the solo campaign as its own complete product — rather than the older assumption that a co-op game is “good enough” alone if you bolt on an AI teammate.