Single-player games like Mega Prison
Below are 12 single-player Steam games similar to Mega Prison, 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 Mega Prison page.
Ranked picks
- 1
Repterra
Single-player alternative to Mega Prison — playable solo, no multiplayer required. Shares Strategy with Mega Prison.
Repterra is a base-building survival RTS set in a world overrun by dinosaurs. Manage your colony while battling massive dino hordes. Breed and ride your own dinos, unlock permanent upgrades, and fight to reclaim the world for humanity.
- 2
Here Comes The Swarm
Single-player alternative to Mega Prison — playable solo, no multiplayer required. Shares Strategy with Mega Prison.
Here Comes the Swarm is a survival RTS with a pause button! Create your strategy, build, manage, and defend your settlements at your own pace. Take the fight to the hive mind and lead expeditions to deliver a deadly blow and eradicate your foes. Will you reclaim Ulora from the relentless Swarm?
- 3
They Are Billions
Single-player alternative to Mega Prison — playable solo, no multiplayer required. Shares Strategy with Mega Prison.
They Are Billions is a Steampunk strategy game set on a post-apocalyptic planet. Build and defend colonies to survive against the billions of the infected that seek to annihilate the few remaining living humans. Can humanity survive after the zombie apocalypse?
- 4
Europa Universalis III Complete
Single-player alternative to Mega Prison — playable solo, no multiplayer required. Shares Strategy with Mega Prison.
Europa Universalis III Complete includes the original Europa Universalis III as well as the expansions In Nomine and Napoleons Ambition Europa Universalis III delves deeply into the areas of exploration, trade, warfare and diplomacy.
- 5
Against the Storm
Single-player alternative to Mega Prison — playable solo, no multiplayer required. Shares Strategy with Mega Prison.
A dark fantasy city builder where you must rebuild civilization in the face of apocalyptic rains. As the Queen’s Viceroy, lead humans, beavers, lizards, foxes, and harpies to reclaim the wilderness and secure a future for civilization's last survivors.
- 6
Judgment: Apocalypse Survival Simulation
Single-player alternative to Mega Prison — playable solo, no multiplayer required. Shares Strategy with Mega Prison.
Build, scavenge, craft, and perform occult rituals to survive in a demon-infested, post-apocalyptic colony simulation. Will you survive Judgment day?
- 7
Tropico 4
Single-player alternative to Mega Prison — playable solo, no multiplayer required. Shares Strategy with Mega Prison.
The world is changing and Tropico is moving with the times - geographical powers rise and fall and the world market is dominated by new players with new demands and offers - and you, as El Presidente, face a whole new set of challenges.
- 8
Tropico 6
Single-player alternative to Mega Prison — playable solo, no multiplayer required. Shares Strategy with Mega Prison.
El Presidente is back! Prove yourself once again as a feared dictator or peace-loving statesman on the island state of Tropico and shape the fate of your very own banana republic through four distinctive eras.
- 9
Rogue Star Rescue
Single-player alternative to Mega Prison — playable solo, no multiplayer required. Shares Strategy with Mega Prison.
Bullet Hell Insanity + Tower Defense Strategy. Rogue Star Rescue is a quirky new type of rogue-like shooter. Blast your way through diverse planets while rescuing your teammates and gathering traps for your defense strategy. Play solo or online to stop the Rogue Star before it annihilates everything!
- 10
Forest Fire
Single-player alternative to Mega Prison — playable solo, no multiplayer required.
Be the Forest Fire and burn everything in sight! A Rogue-lite destruction-fest where every pixel is physically simulated. Burn trees, buildings, vehicles, and tiny screaming humans. Dodge bullet-hell rain clouds and pissed-off firefighters to stay alive... Only YOU can start Forest Fires.
- 11
Sandbox Skyline
Single-player alternative to Mega Prison — playable solo, no multiplayer required. Shares Strategy with Mega Prison.
Build impressive skyscrapers pixel-by-pixel, and protect them from the harsh realities of nature. Each pixel is physically simulated to interact with earthquakes, firestorms, blizzards, and tsunamis. Protect your skyline and expand your territory in this relaxing (yet challenging) sandbox builder.
- 12
Infest
Single-player alternative to Mega Prison — playable solo, no multiplayer required. Shares Strategy with Mega Prison.
Infest is a roguelike deckbuilder where every pixel on the battlefield can burn, freeze, corrode, shock, and melt. Carefully craft your deck and deploy cards to alter the environment, buff your stats, and unleash stunning pixel-by-pixel damage upon your enemies!