Single-player games like Siege Island
Below are 12 single-player Steam games similar to Siege Island, 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 Siege Island page.
Ranked picks
- 1
Reforge Front
Single-player alternative to Siege Island — playable solo, no multiplayer required. Shares Action and Indie with Siege Island.
Defend the furnace from waves of goblins by building and upgrading in an FPS tower defense.
- 2
ITER-8
Single-player alternative to Siege Island — playable solo, no multiplayer required. Shares Action and Indie with Siege Island.
Welcome to the surface, ITER employee #8. Mine the Pillar, upgrade your tools, defend your base, reach the top... or die miserably. Each expendable worker pushes the mission forward - one glorious, replaceable iteration at a time.
- 3
Warpips
Single-player alternative to Siege Island — playable solo, no multiplayer required. Shares Action and Indie with Siege Island.
Warpips is the ultimate quick to learn but amazingly deep tug-of-war strategy game. Deploy the right composition of soldiers, tanks, helicopters and planes in this tight, streamlined strategy-focused war game. Compose the best army, research the right tech; overwhelm your enemy!
- 4
Save Aisha
Single-player alternative to Siege Island — playable solo, no multiplayer required. Shares Action and Indie with Siege Island.
Help Emran rescue his daughter (Aisha) who has been taken from his arms. You will join him in his journey through the castles and forests to meet the king.
- 5
Dome Keeper
Single-player alternative to Siege Island — playable solo, no multiplayer required. Shares Action and Indie with Siege Island.
Defend against waves of alien monsters in this unique roguelike action miner. Dig for resources, collect useful gadgets, and upgrade equipment to increase odds of survival – just hurry back before your dome is destroyed!
- 6
Carnival Massacre
Single-player alternative to Siege Island — playable solo, no multiplayer required. Shares Action and Indie with Siege Island.
Drawing heavily from classic survival horror tropes, Carnival Massacre takes players on a haunting quest in a cursed theme park. Explore your surroundings, manage your messy inventory, solve puzzles and kill the four ringleaders of the park!
- 7
Mars or Die!
Single-player alternative to Siege Island — playable solo, no multiplayer required. Shares Action and Indie with Siege Island.
Control two characters simultaneously! Survive, gather, collect upgrades, fight all sizes of one-eyed Martians, build defensible outposts and conquer Mars, in this glorious mix between roguelite and tower defense.
- 8
Artificial Extinction
Single-player alternative to Siege Island — playable solo, no multiplayer required. Shares Action and Indie with Siege Island.
You have 9 days to find a safe place on the planet. Your ship is low on fuel and you have to land. Setup sentry guns around you to defend yourself while you collect more fuel for the ship. AI controlled Drones and Tanks attack you trying to find weaknesses in your defenses.
- 9
Lovecraft's Untold Stories
Single-player alternative to Siege Island — playable solo, no multiplayer required. Shares Action and Indie with Siege Island.
Lovecraft’s Untold Stories is an action roguelite with RPG elements. Explore randomly generated levels based in Lovecraft's stories, fight cultists and all kinds of monsters from the Mythos, improve your gear, solve puzzles, and find clues and knowledge to defeat the Great Old Ones.
- 10
克苏鲁异闻录
Single-player alternative to Siege Island — playable solo, no multiplayer required. Shares Action and Indie with Siege Island.
基于“克苏鲁神话”世界观下的Roguelike动作冒险游戏作品。玩家将在游戏中身临其境地接触洛夫克拉夫特笔下那些不可名状之物。通过不同的选择调查世界的谜团，合理控制自己的san值让自己在残酷的走位-射击战斗中生存下去！获取装备，磨练技巧，挫败古神与外神们的邪恶计划！
- 11
Lovecraft's Untold Stories 2
Single-player alternative to Siege Island — playable solo, no multiplayer required. Shares Action and Indie with Siege Island.
Lovecraft’s Untold Stories 2 is the continuation of the first action RPG with rogue-like elements based on the Lovecraft Mythos ever released. Brand new graphics, a new and complex crafting system to create your equipment, 6 playable characters, and lots and lots of incredibly challenging content!
- 12
P1R4T3S
Single-player alternative to Siege Island — playable solo, no multiplayer required. Shares Action and Indie with Siege Island.
Gather a fearsome crew and sail the space boarding ships and stations, robbing them naked, and shooting whoever stands in your way in the roguelike with RPG elements P1R4T3S!