Single-player games like DG2: Defense Grid 2
Below are 9 single-player Steam games similar to DG2: Defense Grid 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 DG2: Defense Grid 2 page.
Ranked picks
- 1

Defense Grid: The Awakening
Single-player alternative to DG2: Defense Grid 2 — playable solo, no multiplayer required. Shares Strategy and Indie with DG2: Defense Grid 2.
Defense Grid: The Awakening is a unique spin on tower defense gameplay that will appeal to players of all skill levels. A horde of enemies is invading, and it's up to the player to stop them by strategically building fortification towers around their base.
- 2

Sanctum 2
Single-player alternative to DG2: Defense Grid 2 — playable solo, no multiplayer required. Shares Strategy and Indie with DG2: Defense Grid 2.
Sanctum 2 is the sequel to the world’s first Tower Defense/FPS hybrid game. Pick from four unique character classes and embark on a mission to protect the oxygen-producing Cores from hordes of deadly aliens who are threatened by their existence.
- 3

The Red Solstice
Single-player alternative to DG2: Defense Grid 2 — playable solo, no multiplayer required. Shares Strategy with DG2: Defense Grid 2.
2280 A.D. The last few survivors of a ruined Earth seek a new home: Mars, a planet whose inhabitants didn't take too kindly to outsiders. The Red Solstice is a tense, tactical, squad-based action game. Fight to survive with up to 8 players in co-op, or lead your own squad in single-player mode.
- 4

Infested Planet
Single-player alternative to DG2: Defense Grid 2 — playable solo, no multiplayer required. Shares Strategy and Indie with DG2: Defense Grid 2.
Command a team of 5 elite soldiers against an alien horde of 100,000. Surrounded on all sides, you must outmaneuver and outsmart the enemy.
- 5

X-Morph: Defense
Single-player alternative to DG2: Defense Grid 2 — playable solo, no multiplayer required. Shares Strategy and Indie with DG2: Defense Grid 2.
Unique fusion of a top-down shooter and tower defense strategy. You are the invader! Use destructive weapons or lead your enemies into a maze of towers. Strategize in the build mode by carefully selecting various types of alien towers or throw yourself right into the heat of the battle.
- 6

Anomaly 2
Single-player alternative to DG2: Defense Grid 2 — playable solo, no multiplayer required. Shares Strategy and Indie with DG2: Defense Grid 2.
Anomaly 2 is a sequel to the critically acclaimed Anomaly Warzone Earth. Maintaining the core elements of the original, Anomaly 2 adds plenty of new features: unit morphing, over million tactical combinations, post-apo world and tower defense vs tower offense multiplayer mode.
- 7

Sol Survivor
Single-player alternative to DG2: Defense Grid 2 — playable solo, no multiplayer required. Shares Strategy and Indie with DG2: Defense Grid 2.
Jump in to intense turret defense action with Sol Survivor! Build turrets to defend your colony and the innocent colonists within. Smash enemies with volleys of actively-controlled orbital support. Play with friends in co-operative and competitive multiplayer matches or test your mettle against our new Survival mode!
- 8

AI War 2
Single-player alternative to DG2: Defense Grid 2 — playable solo, no multiplayer required. Shares Strategy and Indie with DG2: Defense Grid 2.
The most devious and acclaimed artificial intelligence in strategy gaming is better than ever. A grand strategy/RTS hybrid that reverses many conventions of both genres. Take territory without attracting attention, build your empire with care, and adapt to an ever-evolving galactic battleground.
- 9

Age of Empires II (Retired)
Single-player alternative to DG2: Defense Grid 2 — playable solo, no multiplayer required. Shares Strategy with DG2: Defense Grid 2.
Age of Empires II has been re-imagined in high definition. With the release of Age of Empires II: Definitive Edition, this product will not be updated further.