Single-player games like Ultimate Summer
Below are 16 single-player Steam games similar to Ultimate Summer, 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 Ultimate Summer page.
Ranked picks
- 1
Zombie camping
Single-player alternative to Ultimate Summer — playable solo, no multiplayer required. Shares Action and Adventure with Ultimate Summer.
Zombie camping is a third person shooter based in a forest camping where zombies are coming in waves trying to kill you.
- 2
Cyberfrags '69
Single-player alternative to Ultimate Summer — playable solo, no multiplayer required. Shares Action and Early Access with Ultimate Summer.
Move fast and shoot fast in Cyberfrags '69. Double jump, wall-run, and blast your way to victory in intense PvP and Co-Op, or play as Cyber-Frank as he slaughters the Cyber-Nazis invading his home!
- 3
The Message
Single-player alternative to Ultimate Summer — playable solo, no multiplayer required. Shares Action and Early Access with Ultimate Summer.
First person shooter in setting of 80th years. You need to kill everyone in the house. Use guns on levels, be fast and kill without doubt.
- 4
Hold or Die
Single-player alternative to Ultimate Summer — playable solo, no multiplayer required. Shares Action and Early Access with Ultimate Summer.
Hold or Die is a last-stand cooperative survival 1st/3rd person shooter where you need protect your base against hordes of mutants. Unite with other survivors. Craft barricades traps and turrets. And try to survive.
- 5
Venus: The Last Ascent
Single-player alternative to Ultimate Summer — playable solo, no multiplayer required. Shares Action and Adventure with Ultimate Summer.
Build a massive physics-driven fortress on wheels in this sci-fi survival game. Mine resources, bolt on new modules, fight off solar-powered machines, and keep moving across the hostile surface of Venus.
- 6
Yet Another Zombie Defense HD
Single-player alternative to Ultimate Summer — playable solo, no multiplayer required. Shares Action with Ultimate Summer.
Top-down zombie shooter with tower defense elements featuring up to 4 players local and online co-op. Build your base by day, defend it by night, put your skills to the test to stay alive as long as possible! Darkness is coming. How long can YOU survive?
- 7
World Crafter TD: Prologue
Single-player alternative to Ultimate Summer — playable solo, no multiplayer required. Shares Action and Adventure with Ultimate Summer.
A highly addictive survival crafting tower defense game! Gather, craft, build turrets, shoot guns, and expand the land to defend against waves of enemies! The prologue for the full game, World Crafter TD!
- 8
World Crafter TD
Single-player alternative to Ultimate Summer — playable solo, no multiplayer required. Shares Action and Adventure with Ultimate Summer.
A highly addictive survival crafting tower defense game! Gather, craft, build turrets, shoot guns, and expand the land to defend against waves of enemies in World Crafter TD!
- 9
Priest Simulator: Vampire Show
Single-player alternative to Ultimate Summer — playable solo, no multiplayer required. Shares Action and Adventure with Ultimate Summer.
A mockumental action game. Go forth and rock in the absolute weirdest and most messed up simulator in the history of sandbox shooters. Fully unprofessional English language version. This dub will have you in stitches.
- 10
Infernal Radiation
Single-player alternative to Ultimate Summer — playable solo, no multiplayer required. Shares Action and Simulation with Ultimate Summer.
Smash demons and deflect bullets in a hardcore arcade clicker with the RPG elements.
- 11
Booze Masters: Freezing Moonshine
Single-player alternative to Ultimate Summer — playable solo, no multiplayer required. Shares Action and Adventure with Ultimate Summer.
Freezing Moonshine is a unsettling first-person adventure game with elements of plant cultivation, puzzles, and lots of high-proof beverages. To survive, you'll need to gather harvests, take photos, and craft a wide variety of spirits.
- 12
Mercyful Flames: The Witches
Single-player alternative to Ultimate Summer — playable solo, no multiplayer required. Shares Action and Adventure with Ultimate Summer.
Experience a dark documentary based on the classic movie Häxan. The narrator will guide you through the spellbinding history of witchcraft. Focus, you are delving into the deepest abyss of black magic that spread panic in the Dark Ages.
- 13
Taxi Simulator
Single-player alternative to Ultimate Summer — playable solo, no multiplayer required. Shares Simulation with Ultimate Summer.
Become a taxi driver and experience for yourself the everyday life in such interesting profession. One might think that working behind a taxi wheel is a dull and boring task. But you couldn’t be more wrong! In Taxi Simulator you'll play as a shady rap driver and drive through the wildly urban areas.
- 14
Your Principal
Single-player alternative to Ultimate Summer — playable solo, no multiplayer required. Shares Action and Simulation with Ultimate Summer.
Do you see that old guy shouting and screaming? that's you the principal Being a Principal is not an easy task. you can be the meanest, sourest principal in history or not.
- 15
Pope Simulator
Single-player alternative to Ultimate Summer — playable solo, no multiplayer required. Shares Simulation with Ultimate Summer.
Pope Simulator features many themes from the fascinating history of the papacy in the second half of the 20th century. Inspiring adventure, political intrigue, moral dilemmas and many themes based on actual events.
- 16
Human Farm
Single-player alternative to Ultimate Summer — playable solo, no multiplayer required. Shares Action and Adventure with Ultimate Summer.
Welcome to Human Farm🐽 – an alternate, Orwellian world where Pigs became the dominant species. Humans are degraded to farmed meat. Create and develop your own slaughterhouse. Your goal: conquer and dominate the human meat industry. Millions of hungry snouts are waiting to be fed!