IMHO.

Single-player games like SCP Idle: SECURE. CONTAIN. PROGRESS.

Below are 8 single-player Steam games similar to SCP Idle: SECURE. CONTAIN. PROGRESS., 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 SCP Idle: SECURE. CONTAIN. PROGRESS. page.

Ranked picks

  1. 1
    Mergeopolis — Steam game cover

    Mergeopolis

    Single-player alternative to SCP Idle: SECURE. CONTAIN. PROGRESS. — playable solo, no multiplayer required. Shares Strategy and Indie with SCP Idle: SECURE. CONTAIN. PROGRESS..

    Merge matching buildings to grow a tiny island into a thriving city. Plan residential, commercial, industrial, and civic districts, reinvest their income, unlock more land, and build at your own pace in this relaxing incremental city builder.

    StrategyIndieSimulationSingle-playerSimilar games →
  2. 2
    Crownhold — Steam game cover

    Crownhold

    Single-player alternative to SCP Idle: SECURE. CONTAIN. PROGRESS. — playable solo, no multiplayer required. Shares Strategy and Indie with SCP Idle: SECURE. CONTAIN. PROGRESS..

    Noble Rulers — grow your realm and expand your castle in this short incremental game! Manage resources, discover foreign lands and build up an army to lay siege to your enemies.

    2026StrategyIndie5.94 USDSingle-playerSimilar games →
  3. 3
    Long Dives — Steam game cover

    Long Dives

    Single-player alternative to SCP Idle: SECURE. CONTAIN. PROGRESS. — playable solo, no multiplayer required. Shares Strategy and Indie with SCP Idle: SECURE. CONTAIN. PROGRESS..

    Sink a mining outpost into the deep and keep it growing while you're away. Dive through ten depths, automate everything, decode the Archive, and strike covenants with the dark. A layered idle-incremental with 50 achievements, full offline progress, illustrated in pixel-art.

    2026StrategyIndieSimulationSingle-playerSimilar games →
  4. 4
    Calmaria: Wild Growth — Steam game cover

    Calmaria: Wild Growth

    Single-player alternative to SCP Idle: SECURE. CONTAIN. PROGRESS. — playable solo, no multiplayer required. Shares Strategy and Indie with SCP Idle: SECURE. CONTAIN. PROGRESS..

    Build and grow your settlement across a procedural archipelago. Gather resources, recruit settlers, automate production and transport, explore new islands and dungeons, find better gear, and prepare your base for the threats ahead.

    2026StrategyIndieAdventureSingle-playerSimilar games →
  5. 5
    Mining and Dwarves — Steam game cover

    Mining and Dwarves

    Single-player alternative to SCP Idle: SECURE. CONTAIN. PROGRESS. — playable solo, no multiplayer required. Shares Strategy and Simulation with SCP Idle: SECURE. CONTAIN. PROGRESS..

    An incremental game where you mine rocks, gather ore, and recruit dwarves. Play actively for maximum gains, or idle and let the dwarves do the work.

    2026StrategySimulationCasualSingle-playerSimilar games →
  6. 6
    Desk Top Racer — Steam game cover

    Desk Top Racer

    Single-player alternative to SCP Idle: SECURE. CONTAIN. PROGRESS. — playable solo, no multiplayer required. Shares Strategy and Indie with SCP Idle: SECURE. CONTAIN. PROGRESS..

    Turn your desktop into a living racetrack with this idle racing management game. Acquire cars, equip parts, and compete online against other players. Win championships and expand your garage through Mastery, Collections, and new rewards.

    2026StrategyIndieSimulationFreeSingle-playerSimilar games →
  7. 7
    The Last Mothership — Steam game cover

    The Last Mothership

    Single-player alternative to SCP Idle: SECURE. CONTAIN. PROGRESS. — playable solo, no multiplayer required.

    A short incremental game about harvesting planets to feed your mothership. Mine, manage resources, grow your fleet, and unlock upgrades to evolve your species. You are the devourer of worlds.

    CasualSingle-playerSimilar games →
  8. 8
    Kingdom Inc. — Steam game cover

    Kingdom Inc.

    Single-player alternative to SCP Idle: SECURE. CONTAIN. PROGRESS. — playable solo, no multiplayer required. Shares Strategy and Indie with SCP Idle: SECURE. CONTAIN. PROGRESS..

    A minimalist factory / city builder. Design your workflow by harvesting resources, building equipment, outfitting your adventurers, and sending them on dangerous missions. Recover lost territory and unravel the plot that threatens to destroy your kingdom!

    2026StrategyIndieSimulationSingle-playerSimilar games →