IMHO.

Single-player games like ProTax 98

Below are 9 single-player Steam games similar to ProTax 98, 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 ProTax 98 page.

Ranked picks

  1. 1
    Human.exe — Steam game cover

    Human.exe

    Single-player alternative to ProTax 98 — playable solo, no multiplayer required.

    An AI has isolated the mind of a philosophy professor to evaluate human morality. As the terminal operator, you access files, run programs, and take his consciousness through ethical dilemmas. Your decisions will train the AI's final algorithm.

    2026IndieSimulationSingle-playerSimilar games →
  2. 2
    Last Draft — Steam game cover

    Last Draft

    Single-player alternative to ProTax 98 — playable solo, no multiplayer required.

    Complete your last draft before sunrise while enduring increasing paranormal activities and relentless monster stalks. Use your typing skills to progress and your instincts to hide, surviving 7 days of pure psychological horror.

    2026StrategyIndieSimulation5.99 USDSingle-playerSimilar games →
  3. 3
    The Ice Cream Shop — Steam game cover

    The Ice Cream Shop

    Single-player alternative to ProTax 98 — playable solo, no multiplayer required. Shares Adventure with ProTax 98.

    The Evil Presence is an immersive first-person psychological horror game. After moving into a new house, a man experiences supernatural occurrences and discovers the untold history of the residence.

    ActionIndieAdventureSingle-playerSimilar games →
  4. 4
    Late Night with Ken Hayes — Steam game cover

    Late Night with Ken Hayes

    Single-player alternative to ProTax 98 — playable solo, no multiplayer required. Shares Adventure with ProTax 98.

    Host the graveyard shift at a small-town radio station in 1998. Callers keep describing the same pale man—and every time someone talks about him on air, he seems to get closer.

    IndieAdventureSingle-playerSimilar games →
  5. 5
    Valley of Shadows — Steam game cover

    Valley of Shadows

    Single-player alternative to ProTax 98 — playable solo, no multiplayer required. Shares Adventure with ProTax 98.

    Valley of Shadows is a short psychological horror set in an ordinary American suburb. Players navigate as James, a family man seeking answers about his missing family, while grappling with paranoia and supernatural forces.

    2024IndieAdventure4.99 USDSingle-playerSimilar games →
  6. 6
    [Redacted] The Safehouse — Steam game cover

    [Redacted] The Safehouse

    Single-player alternative to ProTax 98 — playable solo, no multiplayer required.

    You're a detective. Investigate the haunting events surrounding the murder of Ann Peterson and her boyfriend. Explore an old safehouse for clues, deduce keywords and reveal redacted words as you search Ann's digital journal, and piece together your case report as this unfortunate story unfolds.

    2026Indie3.99 USDSingle-playerSimilar games →
  7. 7
    Snowsquall Grip — Steam game cover

    Snowsquall Grip

    Single-player alternative to ProTax 98 — playable solo, no multiplayer required. Shares Adventure with ProTax 98.

    Escape the snowy nightmare or be trapped forever — your call.

    2024IndieAdventure2.99 USDSingle-playerSimilar games →
  8. 8
    Cats With Standards — Steam game cover

    Cats With Standards

    Single-player alternative to ProTax 98 — playable solo, no multiplayer required. Shares Adventure with ProTax 98.

    Horror Visual Novel where Cats claw through filth for bones and whisper lies to mirrors. Find the Hidden-Objects, obey, smile, and repeat until the lines between rule and ruin blur, and you’re left meowing into the void.

    2025IndieAdventureCasual1.04 USDSingle-playerSimilar games →
  9. 9
    Clayborn Idle — Steam game cover

    Clayborn Idle

    Single-player alternative to ProTax 98 — playable solo, no multiplayer required.

    Forge legendary gear, shape its stats, and chase the ideal build in Clayborn Idle – an incremental ARPG where semi-turn-based combat collides with a deep progression system. Build game-breaking combinations, grow your utility skills, and master a world shaped by both battle and craftsmanship.

    2026RPGSingle-playerSimilar games →