Single-player games like WHO THE HELL OPENED THE PORTAL?!
Below are 10 single-player Steam games similar to WHO THE HELL OPENED THE PORTAL?!, 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 WHO THE HELL OPENED THE PORTAL?! page.
Ranked picks
- 1
Golden Age
Single-player alternative to WHO THE HELL OPENED THE PORTAL?! — playable solo, no multiplayer required. Shares Strategy and Simulation with WHO THE HELL OPENED THE PORTAL?!.
Guard the holy city, and at the right time, go deep into the hinterland of the dark legion, and retrieve the holy objects lost in the last temple catastrophe, the book of contract, the holy grail, the holy sword, the holy stone, the magic bottle, the Thor's hammer, etc.
- 2
绛河之上 Under Supernova
Single-player alternative to WHO THE HELL OPENED THE PORTAL?! — playable solo, no multiplayer required. Shares Strategy and Indie with WHO THE HELL OPENED THE PORTAL?!.
An instant strategy science fiction simulation survival sandbox game. Players can control individuals, teams, and manage multiple bases. Players can farm, build, excavate, fight, produce, graze, explore, trade, record and pass on knowledge, and can also fly a spaceship to explore the starry sky.
- 3
Magine: War of Restoration
Single-player alternative to WHO THE HELL OPENED THE PORTAL?! — playable solo, no multiplayer required. Shares Strategy and Indie with WHO THE HELL OPENED THE PORTAL?!.
A real-time strategy game anyone can pick up, featuring “click-to-deploy” and “zero micromanagement”. On a continent of magic and engine, gather your remnants, rebuild under siege and restore a shattered empire. Say goodbye to complex RTS controls and enjoy the pure joy of strategy and epic battles!
- 4
坍塌世界
Single-player alternative to WHO THE HELL OPENED THE PORTAL?! — playable solo, no multiplayer required. Shares Strategy and Indie with WHO THE HELL OPENED THE PORTAL?!.
"Collapsing World" is an innovative tower defense game blending deck-building and roguelike mechanics. Recruit unique companions, craft powerful skill decks, and tackle randomized stages. Deep strategy breaks the traditional TD mold—every run is a fresh challenge!
- 5
Infinite Evo TD
Single-player alternative to WHO THE HELL OPENED THE PORTAL?! — playable solo, no multiplayer required. Shares Strategy and Indie with WHO THE HELL OPENED THE PORTAL?!.
A tower defense game where mechanics evolve through your choices. Strengthen classic tower defense, blend in other game genres, or abandon tower defense entirely. Each level unlocks a fresh ruleset, making one purchase feel like many games in one.
- 6
Project RR
Single-player alternative to WHO THE HELL OPENED THE PORTAL?! — playable solo, no multiplayer required. Shares Strategy and Indie with WHO THE HELL OPENED THE PORTAL?!.
Project RR is a tactical RPG that seamlessly blends turn-based domain management and exploration with unique real-time combat. Guided by an ancient prophecy, develop your domain, lead your legions, and recruit and nurture heroic allies. Restore peace to the continent of Arcarnia.
- 7
Driftland: The Magic Revival
Single-player alternative to WHO THE HELL OPENED THE PORTAL?! — playable solo, no multiplayer required. Shares Strategy and Indie with WHO THE HELL OPENED THE PORTAL?!.
After a devastating war between ancient mages, a powerful spell is all that holds together the shattered planet of Driftland. Take on the role of a powerful mage capable of moving and connecting floating lands, develop a mighty empire, and restore Driftland to its former glory!
- 8
Kingdom Wars 4
Single-player alternative to WHO THE HELL OPENED THE PORTAL?! — playable solo, no multiplayer required. Shares Strategy and Indie with WHO THE HELL OPENED THE PORTAL?!.
It's 1347, the time of the Hundred Years' War. In this historical grand strategy and RTS hybrid you play as one of 200 minor lords across medieval Europe, Africa or Middle East. Rise up to take over your Kingdom and be crowned, then fight to preserve your empire as Black Death descends on Europe.
- 9
Jorji and Impossible Forest
Single-player alternative to WHO THE HELL OPENED THE PORTAL?! — playable solo, no multiplayer required. Shares Indie with WHO THE HELL OPENED THE PORTAL?!.
Help little Jorji to survive in his journey to the depths of Impossible Forest, in this super-hard, hand-crafted 2D platformer.
- 10
DeadZone Outpost
Single-player alternative to WHO THE HELL OPENED THE PORTAL?! — playable solo, no multiplayer required. Shares Strategy and Indie with WHO THE HELL OPENED THE PORTAL?!.
Turn-based pixel survival shooter against waves of zombies. Limited resources, tactical shooting, diverse weapons, and deep incremental progression with a large skill tree.