Single-player games like IS Defense
Below are 15 single-player Steam games similar to IS Defense, 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 IS Defense page.
Ranked picks
- 1
Heavy Fire: Shattered Spear
Single-player alternative to IS Defense — playable solo, no multiplayer required. Shares Action with IS Defense.
Iran has nuclear weapons and one is sitting on a fully fueled ICBM going through its final launch checklist. Fight your way through Afghanistan, make it over the Iranian border, infiltrate the missile base and permanently stop the countdown in this super fast, high intensity on-rails shooter.
- 2
Blue Estate The Game
Single-player alternative to IS Defense — playable solo, no multiplayer required. Shares Action with IS Defense.
Blue Estate is a black-humoured and corrosive rail shooter, adapted from the critically acclaimed and Eisner Award nominated graphic novel, Blue Estate by Viktor Kalvachev!
- 3
Hatred
Single-player alternative to IS Defense — playable solo, no multiplayer required. Shares Action and Indie with IS Defense.
Hatred is a violent twin-stick shooter, in which you take the role of The Antagonist fighting against all of humanity.
- 4
Mad Bullets
Single-player alternative to IS Defense — playable solo, no multiplayer required. Shares Action and Indie with IS Defense.
Mad Bullets, the wackiest shooter is here to put your reflexes and laughing muscles to an intensive test. You can forget about boring stories, complicated controls and irritating tutorials, and jump right into a mind blowing, high-speed action.
- 5
Wolfenstein: The New Order
Single-player alternative to IS Defense — playable solo, no multiplayer required. Shares Action with IS Defense.
Wolfenstein®: The New Order reignites the series that created the first-person shooter genre. Wolfenstein offers a deep game narrative packed with action, adventure and first-person combat.
- 6
Reload
Single-player alternative to IS Defense — playable solo, no multiplayer required. Shares Action with IS Defense.
Reload is a realistic weapons and tactics trainer for one to four players that also happens to be a super fun, super fast playing game. Go through 35+ training scenarios including Hostage Rescue, Sniping, VIP Protection, and Olympic Style Shooting competition.
- 7
Sanctum
Single-player alternative to IS Defense — playable solo, no multiplayer required. Shares Action and Indie with IS Defense.
You think Tower Defense games are all about building? You thought wrong. Sanctum is not your average Tower Defense title. When the havoc starts, you get to join the fray! As one of the world’s first First Person Shooter - Tower Defense games, Sanctum has taken the best of both worlds to deliver an epic, one-of-a-kind experience.
- 8
Trepang2
Single-player alternative to IS Defense — playable solo, no multiplayer required. Shares Action and Indie with IS Defense.
Become the ultimate badass in Trepang2: A gory, action-packed FPS set in the near future. Unleash all hell on your enemies, dodge bullets and leave a trail of destruction in this hardcore and frenetic shooter.
- 9
Medal of Honor™
Single-player alternative to IS Defense — playable solo, no multiplayer required. Shares Action with IS Defense.
Fight Today's War: Elite Special Forces in a gritty combat campaign using the surgical tactics of Tier 1 Operators combined with the sledgehammer force of Army Rangers.
- 10
Medal of Honor: Airborne
Single-player alternative to IS Defense — playable solo, no multiplayer required. Shares Action with IS Defense.
Step into the boots of Boyd Travers, Private First Class of the “All-American” 82nd Airborne Division, and revolutionize the way the war is fought. From a rocky beginning in Sicily to war winning triumphs in the heart of Germany, fight the epic WWII battles that turned America’s first paratroopers into combat legends.
- 11
Call of Duty®: Warzone™
Single-player alternative to IS Defense — playable solo, no multiplayer required. Shares Action with IS Defense.
Welcome to Call of Duty®: Warzone™, the massive free-to-play combat arena. Experience thrilling modes & new gameplay features across Endgame (for a limited time), Battle Royale, Black Ops Royale, and Resurgence.
- 12
Ancestors Legacy
Single-player alternative to IS Defense — playable solo, no multiplayer required.
Ancestors Legacy is a squad-based real time strategy with a strong focus on tactics. Inspired by medieval European history, it brings to life four different nations and their conflicts, usually solved by war.
- 13
War Mongrels
Single-player alternative to IS Defense — playable solo, no multiplayer required. Shares Action with IS Defense.
War Mongrels is an isometric real-time tactics game that takes place on the eastern front of World War II. Dynamic and tactical gameplay with stealth elements, tightly packed into a dark, fascinating story! Play on your own or in online co-op (PC).
- 14
63 Days
Single-player alternative to IS Defense — playable solo, no multiplayer required. Shares Action with IS Defense.
Coming of age as a part of the first generation born free, WWII stripped me of my family, home, and future. Now I'm left with only one choice: to get my revenge and independence, or die trying. The odds are against us: will our tactics, stealth and teamwork be enough?
- 15
Ancestors Legacy Free Peasant Edition
Single-player alternative to IS Defense — playable solo, no multiplayer required.
Ancestors Legacy Free Peasant Edition represents a part of the full product. Get a taste of medieval battles in this free version of the acclaimed historical RTS! 4 SP missions and 17 MP maps are now available to everyone. Challenge friends, AI, or take part in our League that will start in March!