Single-player games like The Sentinel
Below are 16 single-player Steam games similar to The Sentinel, 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 The Sentinel page.
Ranked picks
- 1

Cosmic Raze
Single-player alternative to The Sentinel — playable solo, no multiplayer required. Shares Strategy and Indie with The Sentinel.
Cosmic Raze is a sci-fi tower defense strategy game. Control advanced weapons, build powerful synergies, and then blast away as aliens attempt to conquer Earth. Between rounds you'll earn unique augmentations, purchase and upgrade a huge variety of weapons, and unlock powerful synergy bonuses.
- 2

Arcane Array Arena
Single-player alternative to The Sentinel — playable solo, no multiplayer required. Shares Strategy and Indie with The Sentinel.
Arcane Array Arena is a shooting auto-battler game that "Combines Offense and Defense". You summon items in a magic circle and shoot them against your opponent! Create your own unique item builds, compose the most powerful deployment, and defeat your opponents!
- 3

Abyss Protection TD
Single-player alternative to The Sentinel — playable solo, no multiplayer required. Shares Strategy and Indie with The Sentinel.
Abyss Protection - dynamic, endless Tower Defense. Fight off the attacks of the inhabitants of the abyss, expand your possessions. Build formidable weapons that will help repulse enemies. Defeat the main evil.
- 4

Lord Of Island
Single-player alternative to The Sentinel — playable solo, no multiplayer required. Shares Strategy and Indie with The Sentinel.
Defend your islands with real-time strategy and tactics! Lead as a Lord, build armies from diverse races, and defeat invading enemies. In a minimalist world, utilize each island’s unique design to rewrite the fate of your people and the destiny of your lands.
- 5

Gallic Wars: Battle Simulator Prologue
Single-player alternative to The Sentinel — playable solo, no multiplayer required. Shares Strategy with The Sentinel.
Time to conquer ROME! Become a commander of Gallic Warriors and destroy Roman Empire in this Rogue-like strategy game.
- 6

Yokai Art: Night Parade of One Hundred Demons
Single-player alternative to The Sentinel — playable solo, no multiplayer required. Shares Strategy and Indie with The Sentinel.
By accident, you broke the seal of the mysterious book, which contains an enormous magical power that allows users to control any Yokai by defeating them and recording their names. This godly power is too much which alerts all the Yokai. You must find your own way to defeat them and survive.
- 7

ShapeHero Factory
Single-player alternative to The Sentinel — playable solo, no multiplayer required. Shares Strategy and Indie with The Sentinel.
In ShapeHero Factory, you’re the engineer of an ever-evolving paint-fuelled factory that spits out magical, shape-based warriors. Send them into battle - to death or glory - then build an even better factory on your next run.
- 8

Elements and build
Single-player alternative to The Sentinel — playable solo, no multiplayer required. Shares Strategy and Indie with The Sentinel.
Form your own genre with skills in different elements, use building rewards to build your own unique maze in randomly generated levels, and fight to survive waves of monsters to win
- 9

Bumper
Single-player alternative to The Sentinel — playable solo, no multiplayer required. Shares Indie and Casual with The Sentinel.
BUMPER is a casual game made on Blender Game Engine where the player must to destroy the vehicles as much as possible, trying not to get caught by the police, reach the checkpoints to get time and improve your weapons.
- 10

War Cube
Single-player alternative to The Sentinel — playable solo, no multiplayer required. Shares Indie and Casual with The Sentinel.
War Cube is a strategy game, each team is on a face of the cube and the player must turn sideways to position your troops so that they stop in an attacking position, being behind or beside the enemy.
- 11

Space Hit
Single-player alternative to The Sentinel — playable solo, no multiplayer required. Shares Indie and Casual with The Sentinel.
On SPACE HIT you finished your space mission, and it's just time to come back home, but your journey will not be so easy as you think...
- 12

TOTOBALL
Single-player alternative to The Sentinel — playable solo, no multiplayer required. Shares Indie and Casual with The Sentinel.
TOTOBALL, also known as table football, is a football-inspired game. In it players have to pull, push and spin the soccer players that are stuck in cross bars, a simple game that can give you lots of fun times with your friends
- 13

FIGHTING BOX
Single-player alternative to The Sentinel — playable solo, no multiplayer required. Shares Indie and Casual with The Sentinel.
Fighting box is a casual game with characters that use boxing gloves, the player must to hit the opponent until his energy bar drain out, or the opponent fall out from the ring. The game use procedural levels, so the player can play as long as he survives or until the time out per round.
- 14

SALVATOR
Single-player alternative to The Sentinel — playable solo, no multiplayer required. Shares Indie and Casual with The Sentinel.
All souls around of the world were taken by the shadows beings and trapped in asteroids wandering through space, but there is an angel known as SALVATOR, that have the mission of rescue the souls to return them to home and save the world.
- 15

ARENA 8
Single-player alternative to The Sentinel — playable solo, no multiplayer required. Shares Indie and Casual with The Sentinel.
What happens when warriors, worlds and different times decide to face each other to know who is the best? The "ARENA 8", a place where these warriors can solve their differences.
- 16

The last soldier
Single-player alternative to The Sentinel — playable solo, no multiplayer required. Shares Indie and Casual with The Sentinel.
"The last soldier" is a game where the player controls a soldier who is the sole survivor of his battalion. Into the game the player will find 6 game modes and 21 goals, where the player can shoot, paralyze enemies, steal war tanks, blow up enemy tanks, escape and more ...