Single-player games like Mecha Knights: Nightmare
Below are 16 single-player Steam games similar to Mecha Knights: Nightmare, 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 Mecha Knights: Nightmare page.
Ranked picks
- 1

DAEMON X MACHINA
Single-player alternative to Mecha Knights: Nightmare — playable solo, no multiplayer required. Shares Action with Mecha Knights: Nightmare.
Pilot your fully customizable Arsenal mech and join your fellow mercenaries in defending humanity from the corrupted machines and gigantic robots in this post-apocalyptic action game!
- 2

ARMORED CORE™ VI FIRES OF RUBICON™
Single-player alternative to Mecha Knights: Nightmare — playable solo, no multiplayer required. Shares Action with Mecha Knights: Nightmare.
A new action game based on the concept of the ARMORED CORE series that uses the knowledge gained from FromSoftware's recent action game development.
- 3

battleMETAL
Single-player alternative to Mecha Knights: Nightmare — playable solo, no multiplayer required. Shares Action and Indie with Mecha Knights: Nightmare.
battleMETAL is a successor to the 90's mech games, a cross between the mech-piloting of Mechwarrior 2 and ferocity of Quake. Command a massive warmachine bristling with firepower as you blast through a war-torn world.
- 4

Dolls Nest
Single-player alternative to Mecha Knights: Nightmare — playable solo, no multiplayer required. Shares Action with Mecha Knights: Nightmare.
Dolls Nest is a 3D action game where you can customize mecha girls and explore a ruined world. As a Frame Unit, your adventure will pit you against the gigantic autonomous factory world of Hod. Overcome obstacles using the parts at your disposal and uncover the mysteries that lie at its center.
- 5

M.A.S.S. Builder
Single-player alternative to Mecha Knights: Nightmare — playable solo, no multiplayer required. Shares Action and Indie with Mecha Knights: Nightmare.
Commander, customize and build your Mechanical Assault Skeleton Suit (M.A.S.S.) and lead the fight against an alien invasion bent on exterminating the human race. The fate of humanity is in your hands.
- 6

MechWarrior 5: Clans
Single-player alternative to Mecha Knights: Nightmare — playable solo, no multiplayer required. Shares Action with Mecha Knights: Nightmare.
In MECHWARRIOR 5: CLANS, players become new Smoke Jaguar pilots in the Clan Invasion of the Inner Sphere. Lead a five-mech "Star" squad across diverse planets, engaging in an expansive campaign with immersive gameplay and intricate combat. Customize BattleMechs and explore strategic options.
- 7

BREAK ARTS II
Single-player alternative to Mecha Knights: Nightmare — playable solo, no multiplayer required. Shares Action and Indie with Mecha Knights: Nightmare.
Faster than anyone. Stronger than anyone. And more stunning. Customize your robot for “cyber battle racing” in a game that offers all the thrills of racing, battle, and customization. Online, Offline, Time-Attack... which mode will you dominate?!
- 8

LEFT ALIVE™
Single-player alternative to Mecha Knights: Nightmare — playable solo, no multiplayer required. Shares Action with Mecha Knights: Nightmare.
LEFT ALIVE™ is a brand-new survival action shooter telling a human story of survival from the perspective of three different protagonists during the devastating invasion set in war-torn Novo Slava in 2127.
- 9

Muv-Luv
Single-player alternative to Mecha Knights: Nightmare — playable solo, no multiplayer required.
One of the most highly-acclaimed visual novel series arrives on Steam, newly revamped and officially in English! An interdimensional love story that takes high school romance on a roller-coaster ride through the depths of despair, culminating in a sci-fi grand finale of epic proportions.
- 10

Attack on Titan 2 - A.O.T.2
Single-player alternative to Mecha Knights: Nightmare — playable solo, no multiplayer required. Shares Action with Mecha Knights: Nightmare.
Abandon all fear. Attack on Titan 2 is the gripping sequel to the action game based on the worldwide hit anime series "Attack on Titan."
- 11

MechWarrior 5: Mercenaries
Single-player alternative to Mecha Knights: Nightmare — playable solo, no multiplayer required. Shares Action with Mecha Knights: Nightmare.
The year is 3015. The battlefields are dominated by war machines known as BattleMechs. Level entire cities and decimate the enemy in your BattleMech. Follow a quest for glory and revenge. Manage an expanding mercenary company. Fight alongside your friends with a four-player PvE co-op.
- 12

EARTH DEFENSE FORCE 5
Single-player alternative to Mecha Knights: Nightmare — playable solo, no multiplayer required. Shares Action with Mecha Knights: Nightmare.
Stand and fight for humanity. This arcade shooter takes place in the year 2022, as the Earth Defense Force fends off an all-out attack by unknown life forms. Become an EDF soldier, battle against endless hordes of immense enemies, and restore peace to the earth.
- 13

Project MIKHAIL: A Muv-Luv War Story
Single-player alternative to Mecha Knights: Nightmare — playable solo, no multiplayer required. Shares Action with Mecha Knights: Nightmare.
Set on an Earth where mankind is being steadily annihilated by the alien invaders known as the BETA, Project MIKHAIL lets you pilot a Tactical Surface Fighter in the war to save humanity!
- 14

Armored
Single-player alternative to Mecha Knights: Nightmare — playable solo, no multiplayer required. Shares Action and Indie with Mecha Knights: Nightmare.
It's time for you to prove yourself in the management of armored vehicles. You have to perform many operations from liberating the territory to escorting VIP and battling against enemy armored vehicles.
- 15

Serious Sam 3: BFE
Single-player alternative to Mecha Knights: Nightmare — playable solo, no multiplayer required. Shares Action and Indie with Mecha Knights: Nightmare.
Serious Sam 3: BFE is a prequel to the original indie fast action FPS and Game of the Year sensation - Serious Sam: The First Encounter!
- 16

SILENT HILL 2
Single-player alternative to Mecha Knights: Nightmare — playable solo, no multiplayer required. Shares Action with Mecha Knights: Nightmare.
Investigating a letter from his late wife, James returns to where they made so many memories - Silent Hill. What he finds is a ghost town, prowled by disturbing monsters and cloaked in deep fog. Confront the monsters, solve puzzles, and search for traces of your wife in this remake of SILENT HILL 2.