Single-player games like The Declassifier
Below are 8 single-player Steam games similar to The Declassifier, 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 The Declassifier page.
Ranked picks
- 1
Spacey Vade
Single-player alternative to The Declassifier — playable solo, no multiplayer required. Shares Action and Indie with The Declassifier.
Synth-wave styled physics based 2D puzzle shooter filled with nods to the golden era of classic arcade games. Think upside down Peggle crossed with Space Invaders and enemies crafted from the blended remains 70's, and 80’s gaming.
- 2
2nd Shot
Single-player alternative to The Declassifier — playable solo, no multiplayer required. Shares Action and Indie with The Declassifier.
In the vast depths of space, lies a man with a dark past. Setting himself apart from that old life, and seeking justice against wrongdoing instead of being the cause of it, Captain Righteous uses the Freedom Fighter, his trusty space fighter to search for and combat the evil Captain Buster!
- 3
Dead End City
Single-player alternative to The Declassifier — playable solo, no multiplayer required. Shares Action and Indie with The Declassifier.
A post-apocalyptic arcade shooter. Collect fuel and dodge enemy fire as you fight back against the evil Scorpio gang. Mixes cars, shmups and themes that would have been right at home in 80's anime and arcades..
- 4
Defendor
Single-player alternative to The Declassifier — playable solo, no multiplayer required. Shares Action with The Declassifier.
Defendor is a throwback to the fast paced arcade games of the 80s.A retro style, arcade shooter where you upgrade your base to increase the capabilities of your ship, unlock new weapons, ships and cause more mayhem.Defend your base until everyone makes it into the escape ship.
- 5
GALXAGAR
Single-player alternative to The Declassifier — playable solo, no multiplayer required. Shares Action with The Declassifier.
"Don't go to GALXAGAR"; a phrase uttered by many who have traversed its rim. Untold treasures, and terrors, await within its blackened depths. Ready your craft, spacefarer, because you're about to enter the most dangerous sector in all the stars. Get ready.. for GALXAGAR!
- 6
Return Ace
Single-player alternative to The Declassifier — playable solo, no multiplayer required. Shares Action and Indie with The Declassifier.
Be shot and shoot back! Rule reversal type Shmup "Return Ace"What you have been given is the power to take advantage of the oncoming malice and return it.Please enjoy the unique sense of incompatibility, tension, and striking that the experience of bullet energy weaves.
- 7
River Rush
Single-player alternative to The Declassifier — playable solo, no multiplayer required. Shares Action and Indie with The Declassifier.
Take your chance and feel like 10 again.😊To start let's meet this retro cutie.🚀 River Rush is reminiscent of an old vertically scrolling shoot’em up games.🚀 If you remember them, it's time to catch up with nostalgia. Or your father's nostalgia.😉 Board in and have some fun.👨🚀
- 8
Battle AirForce
Single-player alternative to The Declassifier — playable solo, no multiplayer required. Shares Action and Indie with The Declassifier.
Three years after Battle Marine a new battle is about to begin! Battle AirForce is the first orthodox style vertical scrolling bullet hell STG since NOKOGI Rider by SUZUKI PLAN. It was created in Z80 full assembly language, aiming at a level close to the limit of VGS-Zero.