Single-player games like iStorm
Below are 8 single-player Steam games similar to iStorm, 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 iStorm page.
Ranked picks
- 1

IL-2 Sturmovik: Battle of Stalingrad
Single-player alternative to iStorm — playable solo, no multiplayer required. Shares Action with iStorm.
IL-2 Sturmovik: Battle of Stalingrad is the continuation of the legendary IL-2 Sturmovik series that has set the standard for PC combat flight games for more than ten years. This new entry into the series will offer virtual pilots an even more accurate simulation of the most famous air battles.
- 2

Fortress V2
Single-player alternative to iStorm — playable solo, no multiplayer required. Shares Action with iStorm.
Fortress V2 is an artillery shooting game where you can team up with up to 4 friends on various maps and play using tanks of various abilities.
- 3

Men of War: Assault Squad 2
Single-player alternative to iStorm — playable solo, no multiplayer required. Shares Action with iStorm.
Men of War: Assault Squad 2 expands the real-time tactics series with new skirmish missions, massive multiplayer battles, enhanced visuals, improved AI, and full Direct Control. Command five factions across 65 maps, 250 vehicles, and 200 soldiers in one of the most detailed WWII RTS experiences.
- 4

Company of Heroes 2
Single-player alternative to iStorm — playable solo, no multiplayer required.
Experience the ultimate WWII RTS platform with COH2 and its standalone expansions. This package includes the base game, which you can then upgrade by purchasing The Western Front Armies, Ardennes Assault and/or The British Forces. More info in the "About This Game" section below.
- 5

Act of Aggression - Reboot Edition
Single-player alternative to iStorm — playable solo, no multiplayer required.
Act of Aggression – Reboot Edition brings the techno-thriller RTS game Act of Aggression to a higher level. The Reboot Edition offers a full gameplay overhaul in skirmish mode against the AI and in your multiplayer battles.
- 6

Soldiers: Heroes of World War II - Enhanced Edition
Single-player alternative to iStorm — playable solo, no multiplayer required.
The first installment in the real-time tactics series that would become known as Men of War, now refreshed and enhanced! Take command of American, British, Soviet, or German forces and fight on the battlefields of World War II in 32 single-player missions or with others in PvP and co-op sessions.
- 7

ONRAID
Single-player alternative to iStorm — playable solo, no multiplayer required. Shares Action with iStorm.
Onraid is a challenging 2D shooter game, where you are free to develop your own play style and tactics to destroy your enemies.
- 8

War Thunder
Single-player alternative to iStorm — playable solo, no multiplayer required. Shares Action with iStorm.
War Thunder is the most comprehensive free-to-play, cross-platform, MMO military game dedicated to aviation, armoured vehicles, and naval craft, from the early 20th century to the most advanced modern combat units. Join now and take part in major battles on land, in the air, and at sea.