Single-player games like Nullsec: Unauthorized Access
Below are 8 single-player Steam games similar to Nullsec: Unauthorized Access, 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 Nullsec: Unauthorized Access page.
Ranked picks
- 1
Hacker vs IT
Single-player alternative to Nullsec: Unauthorized Access — playable solo, no multiplayer required. Shares Strategy and Simulation with Nullsec: Unauthorized Access.
A game to show how really a fight between a Hacker and a IT worker works and how hackers operate. Old MS-DOS game.
- 2
O.R.B.S.
Single-player alternative to Nullsec: Unauthorized Access — playable solo, no multiplayer required. Shares Simulation with Nullsec: Unauthorized Access.
A wizard finds a computer terminal inside his scrying orb. Tend your tower through a fantasy command line — brew, research, scry, ward — then write spells that teach the orb to do it for you. Prepare yourself for incursions by other wizards.
- 3
Cyber Academy
Single-player alternative to Nullsec: Unauthorized Access — playable solo, no multiplayer required. Shares Strategy and Simulation with Nullsec: Unauthorized Access.
Master cybersecurity by doing inside a living virtual OS. Complete hands on modules, then enter a safe fictional Dark Net where virtual operators infiltrate rivals, defend their own systems, hunt traces and compete for reputation. More modules are coming.
- 4
Phasewright
Single-player alternative to Nullsec: Unauthorized Access — playable solo, no multiplayer required. Shares Strategy and Simulation with Nullsec: Unauthorized Access.
A pulse crosses one cell per tick — the longer way arrives later. From that one rule you build machines out of light: lay conduits, split colours, hit the beat. Quiet, untimed, free.
- 5
Remain At Your Desk
Single-player alternative to Nullsec: Unauthorized Access — playable solo, no multiplayer required. Shares Strategy and Simulation with Nullsec: Unauthorized Access.
Incremental hacker about faking productivity while stealing from your employer. Sell intel for credits or keep it and raise suspicion. One bad audit and you’re back to Intern.
- 6
HackMeNow
Single-player alternative to Nullsec: Unauthorized Access — playable solo, no multiplayer required. Shares Strategy and Simulation with Nullsec: Unauthorized Access.
A terminal-style hacking puzzle game where every command matters. Investigate logs, decode secrets, avoid traps, and uncover the rogue system watching from behind the screen.
- 7
FORK BOMB: A Programming Game
Single-player alternative to Nullsec: Unauthorized Access — playable solo, no multiplayer required. Shares Strategy and Simulation with Nullsec: Unauthorized Access.
Write real code in a Python-like language to control one machine that copies itself. Then watch a thousand copies of your program eat a world. A single-player programming incremental game about self-replicating machines.
- 8
SYSCALL: RING ZERO
Single-player alternative to Nullsec: Unauthorized Access — playable solo, no multiplayer required. Shares Strategy and Simulation with Nullsec: Unauthorized Access.
Reverse-engineer a private 1990s BBS. Read disassembly, patch broken checks, optimize a nine-core rack, and write assembly firmware that locks onto live scope traces. With 200+ puzzles, full controller support and offline play, you can refine your assembly skills on all your devices!