Single-player games like Intrusion 2
Below are 9 single-player Steam games similar to Intrusion 2, 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 Intrusion 2 page.
Ranked picks
- 1

Gunhound EX
Single-player alternative to Intrusion 2 — playable solo, no multiplayer required. Shares Action and Indie with Intrusion 2.
Gear up and get ready for war! Take on hectic 2D action shooting stages with your deadly Gunhound mech.
- 2

GIGANTIC ARMY
Single-player alternative to Intrusion 2 — playable solo, no multiplayer required. Shares Action and Indie with Intrusion 2.
Side-scrolling mech-shooting bad-assery is BACK!GIGANTIC ARMY is a heartfelt homage to 16-bit era mech shooters such as Cybernator / Assault Suits Valken, Metal Warriors, and Front Mission: Gun Hazard, developed by the studio behind the acclaimed shooter SATAZIUS.
- 3

Thunder Kid II: Null Mission
Single-player alternative to Intrusion 2 — playable solo, no multiplayer required. Shares Action and Indie with Intrusion 2.
Thunder Kid, come in. The Robot Empire is back, and they're kidnapping all the humans! Run 'n' gun through colorful environments, dodge bullets, blast enemies, and face off with challenging bosses in this engaging, 3D action platformer. Do you have what it takes to save humanity?
- 4

ARMED SEVEN
Single-player alternative to Intrusion 2 — playable solo, no multiplayer required. Shares Action and Indie with Intrusion 2.
The year is 1989. 12 years have passed since the Gogoh Army’s invasion of Earth. Exposure to alien technology during the war enabled Earth’s own technologies to take massive leaps forward. International conflict that was previously rife in the history of mankind fell to an all-time low, and the Earth Federation was established as a...
- 5

B.A.D Battle Armor Division
Single-player alternative to Intrusion 2 — playable solo, no multiplayer required. Shares Action and Indie with Intrusion 2.
B.A.D is an intense and enjoyable Shoote'em up game that captures the feeling of controlling a mass-produced humanoid robot (Battle Armor) piloted by a single soldier while keeping the realistic fast-paced action in a dramatic large scale conflict, from various Factions of Earth and Mars.
- 6

Astebreed: Definitive Edition
Single-player alternative to Intrusion 2 — playable solo, no multiplayer required. Shares Action and Indie with Intrusion 2.
Climb into the cockpit of an otherworldly war machine and fly into battle against a horrifying alien race bent on eradicating humanity to preserve their own civilization.
- 7

GRAND CROSS: ReNOVATION
Single-player alternative to Intrusion 2 — playable solo, no multiplayer required. Shares Action and Indie with Intrusion 2.
Slash through enemies with the Sun Blade, the most powerful weapon in Shmup's history! Overwhelm hordes of enemies with flashy on-screen effects in this super-aggressive vertical scrolling shump!
- 8

Zombotron
Single-player alternative to Intrusion 2 — playable solo, no multiplayer required. Shares Action and Indie with Intrusion 2.
Fight to survive on a mysterious alien planet, outwit its vicious inhabitants, and do whatever it takes to find a way off that wretched rock.
- 9

METAL SLUG
Single-player alternative to Intrusion 2 — playable solo, no multiplayer required. Shares Action with Intrusion 2.
“METAL SLUG ”, the very first title in SNK’s legendary 2D run & gun action shooting game series where all began, returns to the missions on the Steam gaming platform!