Single-player games like National Machine
Below are 9 single-player Steam games similar to National Machine, 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 National Machine page.
Ranked picks
- 1

Ground of Aces
Single-player alternative to National Machine — playable solo, no multiplayer required. Shares Strategy and Simulation with National Machine.
Take command of a remote military air base during World War II. Build your own airfield, manage iconic aircraft and oversee your crew’s well-being. Prepare them against air raids and send your pilots on dangerous missions. Survive and help your nation win the war!
- 2

Primitive Society Simulator
Single-player alternative to National Machine — playable solo, no multiplayer required. Shares Strategy and Indie with National Machine.
A colony-building game combined with grand strategy elements. Play as a tribal leader, guiding your people from the Stone Age to the Bronze Age. Survive, multiply, and compete for territory among ancient nations.
- 3

Voxel Tycoon
Single-player alternative to National Machine — playable solo, no multiplayer required. Shares Strategy and Indie with National Machine.
Voxel Tycoon — a management sim set in the infinite voxel world. Mine resources and process them into goods on your custom factories. Set up supply chains and passenger routes with a huge fleet of trains, trucks, and buses, and turn small towns into prosperous megacities with a thriving economy!
- 4

Railway Empire 2
Single-player alternative to National Machine — playable solo, no multiplayer required. Shares Strategy and Simulation with National Machine.
Don the coat of a clever entrepreneur, take over a small railway company in the early 1800s and turn your steam engines into the workhorses of the economy. Grow your company into the largest railway company of the continent and outsmart your competitors.
- 5

Railway Empire
Single-player alternative to National Machine — playable solo, no multiplayer required. Shares Strategy and Simulation with National Machine.
In Railway Empire, you will create an elaborate and wide-ranging rail network, purchase over 40 different trains modelled in extraordinary detail, and buy or build railway stations, maintenance buildings, factories and tourist attractions to keep your travel network ahead of the competition.
- 6

RAILGRADE
Single-player alternative to National Machine — playable solo, no multiplayer required. Shares Strategy and Simulation with National Machine.
RAILGRADE is the train RTS game! Construct dense vertical railroads, build cities, construct vast factory chains with train automation! Restore an off world colony's economy all in the intense story driven campaign or relaxing sandbox mode!
- 7

Making History: The Second World War
Single-player alternative to National Machine — playable solo, no multiplayer required. Shares Strategy and Indie with National Machine.
Choose a nation and prepare for the greatest conflict in human history, World War II. Build your military and industrial power, form alliances and race to achieve the advanced technologies that will bring total victory in this global-wide turn-based Grand Strategy struggle.
- 8

Norland
Single-player alternative to National Machine — playable solo, no multiplayer required. Shares Strategy and Simulation with National Machine.
Lead your noble family in this medieval colony sim, facing off against class conflict, religious struggle, and political treachery. Tend to your people’s needs, uncover the lost knowledge of a fallen empire, and engage in nefarious plots against your enemies.
- 9

Factorio
Single-player alternative to National Machine — playable solo, no multiplayer required. Shares Strategy and Indie with National Machine.
Factorio is a game about building and creating automated factories to produce items of increasing complexity, within an infinite 2D world. Use your imagination to design your factory, combine simple elements into ingenious structures, and finally protect it from the creatures who don't really like you.