Single-player games like SUCCESSOR OF THE KEY
Below are 8 single-player Steam games similar to SUCCESSOR OF THE KEY, 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 SUCCESSOR OF THE KEY page.
Ranked picks
- 1
GeminiArms
Single-player alternative to SUCCESSOR OF THE KEY — playable solo, no multiplayer required. Shares Action and Indie with SUCCESSOR OF THE KEY.
GeminiArms is a side scrolling 2D shoot'em up.
- 2
Astro Attack
Single-player alternative to SUCCESSOR OF THE KEY — playable solo, no multiplayer required. Shares Action and Indie with SUCCESSOR OF THE KEY.
A single-stick arcade shoot 'em up inspired by the golden years of retro gaming. Blast to the synthwave beat to combine powerups and destroy waves of invaders. Complete missions, compete on leaderboards, discover secrets, and unlock over 80 unique ships from every era of gaming.
- 3
BorderCollie Blaster
Single-player alternative to SUCCESSOR OF THE KEY — playable solo, no multiplayer required. Shares Action and Casual with SUCCESSOR OF THE KEY.
Kira is back! In this arcade style shoot ´em up you´ll encounter different foes, defeat big alien bosses and collect power-ups and new weapons to fight your way through 12 exciting stages and find the holy bone Kira (the star of the game) is looking for.
- 4
Marimo-VS-IAS
Single-player alternative to SUCCESSOR OF THE KEY — playable solo, no multiplayer required. Shares Action and Indie with SUCCESSOR OF THE KEY.
Cute marimo take down waves of invading alien species in this side-scrolling shooter! A 2.5D shooting game that blends classic side-scrolling action with strategic depth-based combat. Target priority and strategy are the keys to achieving high scores!
- 5
NeverAwake
Single-player alternative to SUCCESSOR OF THE KEY — playable solo, no multiplayer required. Shares Action and Indie with SUCCESSOR OF THE KEY.
A girl who never wakes up. She has been fighting monsters in her dreams... "NeverAwake" is a nightmarish twin-stick shooter with a unique worldview and original game rules.
- 6
Beekyr Reloaded
Single-player alternative to SUCCESSOR OF THE KEY — playable solo, no multiplayer required. Shares Action and Indie with SUCCESSOR OF THE KEY.
The giant hornets have destroyed your hive and taken the pollen. Fight the swarms alone or with a friend and destroy the dangerous hornet queen! The insect world is very dangerous but... what are you waiting for to get your revenge?
- 7
Super Glitter Rush
Single-player alternative to SUCCESSOR OF THE KEY — playable solo, no multiplayer required. Shares Action and Indie with SUCCESSOR OF THE KEY.
Super Glitter Rush is a boss-rush style bullet hell shoot-em-up!
- 8
Space War: Infinity
Single-player alternative to SUCCESSOR OF THE KEY — playable solo, no multiplayer required. Shares Action and Indie with SUCCESSOR OF THE KEY.
Vertical semi-procedural shmup with upgrades, real-time enemy waves, and infinite replayability. Level up your ship, unlock 20+ weapons, defeat 5 bosses, and survive endless bullet-hell combat.