Single-player games like Onyx
Below are 15 single-player Steam games similar to Onyx, 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 Onyx page.
Ranked picks
- 1

Fantasy Heroes
Single-player alternative to Onyx — playable solo, no multiplayer required. Shares Indie and Adventure with Onyx.
Fantasy Heroes follows the adventures of Tristan, a knight of the kingdom of Kayzerhart, and Melanie, his chance buddy. Soon both are engulfed in a massive conflict that could very well threaten the whole world.
- 2

The Adventure of Magical Girl
Single-player alternative to Onyx — playable solo, no multiplayer required. Shares Indie and Adventure with Onyx.
Magical Girl + JRPG! The mercenaries Kaim and Asal are unable to get used to the court life, so they give up their lordship and continue to wander around, living by eating grass as mercenaries. But their boring routine is broken again. They would meet the three students from the magic academy.
- 3

Undefeated
Single-player alternative to Onyx — playable solo, no multiplayer required. Shares Indie and Adventure with Onyx.
16-bit RPG magic is back! Can you stop the Wastelands from spreading and overtaking the world? Play as Marcus, Bastien and Fela, 3 army conscripts with little liking for their new life, yet who find themselves engulfed in a mystery that could very well cause the demise of their nation.
- 4

The King's Heroes
Single-player alternative to Onyx — playable solo, no multiplayer required. Shares Indie and Adventure with Onyx.
Choose among a knight, a witch, a minister even, and several others, and try to find out what happened to the King's daughter. Composing a well balanced party is important. Will they end up heroes, or zeros?
- 5

Opaline
Single-player alternative to Onyx — playable solo, no multiplayer required. Shares Indie and Adventure with Onyx.
In this 16-bit style RPG, Gallow and Liza are two teenagers gifted with great powers, and that destiny seems to persist in keeping away from each other, however their feelings drive them close. Can the two of them have what it takes to preserve the world from the rise of the Blight?
- 6

Wind Child
Single-player alternative to Onyx — playable solo, no multiplayer required. Shares Indie and Adventure with Onyx.
Five souls, brought together in a simple rescue mission, come to learn that they are more connected than they had believed. Classic RPG goodness and intriguing storyline with this RPG from Valkyria Studios.
- 7

猎魔者战纪
Single-player alternative to Onyx — playable solo, no multiplayer required. Shares Indie and Adventure with Onyx.
这是一款轻松休闲的角色扮演游戏,和米娅一起冒险,发现深藏在王国深处的秘密。
- 8

浮世万千之前世今生
Single-player alternative to Onyx — playable solo, no multiplayer required. Shares Indie and Adventure with Onyx.
"Floating world before the world this life" is an independent stand-alone game, this game is floating world myriad game series in the second.The game is a full-length xiuxian novel stream game, using the traditional turn-based combat system.
- 9

IronBorn
Single-player alternative to Onyx — playable solo, no multiplayer required. Shares Indie and Adventure with Onyx.
What if you discovered that you have the power to stop an evil menace? What if you discovered that to complete that journey, you would have to face your own brother? Join Dale and his friends on a quest of self-discovery, friendship and heroism!
- 10

Skyfall
Single-player alternative to Onyx — playable solo, no multiplayer required. Shares Indie and RPG with Onyx.
Play an exciting 2D old-school RPG in the classic style of Valiant - Resurrection by the same developers.
- 11

Unlikely Heroes
Single-player alternative to Onyx — playable solo, no multiplayer required. Shares Indie and RPG with Onyx.
The evil Lich King, lord of the Undead, is rising once more. It weighs upon your shoulders to do what no one before could, defeat it once and for all, and rid humanity of this ultimate evil!
- 12

Memento Vivere
Single-player alternative to Onyx — playable solo, no multiplayer required. Shares Indie and RPG with Onyx.
Dekar is a noble warrior who has a estranged relationship with his father. After abandoning his rights to the throne and choosing to live a simple life, everything changes for him when a Winged One crashes into his village asking for his help. The fate of the world now lies on his shoulders.
- 13

The Witch Doctor
Single-player alternative to Onyx — playable solo, no multiplayer required. Shares Indie and RPG with Onyx.
Lua is a Witch Doctor, a mutated magician that helps those in need, though they only repay her with disdain and prejudice. As one of the last of her kind, Lua finds out a fellow magician has evil plans to ressurrect the Gigantos, she takes it upon herself to stop the rogue magician.
- 14

Above the Skies
Single-player alternative to Onyx — playable solo, no multiplayer required. Shares Indie and RPG with Onyx.
Dylan is the head of a small village and captain of The Eagle and he takes it upon himself to find The Grail and stop the Falls, saving those he cares for. The journey will be long and perilous, but the whole world above the skies depends on it.
- 15

Sandfall
Single-player alternative to Onyx — playable solo, no multiplayer required. Shares Indie and RPG with Onyx.
The Sand War, a destructive conflict that took place over 30 years ago, still inflicts collateral damages on the continent. Our heroes must discover the the truth behind the war and bring peace once more to the continent while dealing with their own inner conflicts.