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

PhaigeX: Hyperspace Survivors
Single-player alternative to TETRAGUN — playable solo, no multiplayer required. Shares Action and Indie with TETRAGUN.
PhaigeX is a fast-paced "Bullet Heaven" space shooter, tasking the player to explore space sectors and contain a rising incursion of rogue AI-controlled units. Pilot a variety of ships, call in the support craft, and use a myriad of upgrades to lay down heavy firepower towards the enemy forces.
- 2

SALTWATER
Single-player alternative to TETRAGUN — playable solo, no multiplayer required. Shares Action and Strategy with TETRAGUN.
Play as a pistol shrimp and survive waves of enemies while collecting pearls from oysters scattered throughout the map.
- 3

SYNTHETIK 2
Single-player alternative to TETRAGUN — playable solo, no multiplayer required. Shares Action and Indie with TETRAGUN.
SYNTHETIK 2 is a unrelenting tactical-shooter rogue-lite. Play alone or with friends. Loot powerful tech. Experience the next level in gun-play. Upgrade your androids to rival the machine gods!
- 4

Run Build Pew!
Single-player alternative to TETRAGUN — playable solo, no multiplayer required. Shares Action and Strategy with TETRAGUN.
You’re being Bounty-Hunted! Run, Build your ship piece-by-piece and make it work with the parts you find, Destroy outposts and waves of fleets, and Pick your battles carefully to overcome your hunters in this Fast-Paced Top-Down Action Roguelite Shooter.
- 5

Rogue: Genesia
Single-player alternative to TETRAGUN — playable solo, no multiplayer required. Shares Action and Strategy with TETRAGUN.
Walk upon a new world and slay foes endangering it. Rogue : Genesia is an action rogue-lite game, where you fight relentless hordes consisting of hundreds and thousands of monsters, make your build, break the balance, defeat bosses and save one of the many worlds.
- 6

Neon Sundown
Single-player alternative to TETRAGUN — playable solo, no multiplayer required. Shares Action and Indie with TETRAGUN.
Neon Sundown is an extremely challenging arena-shooter that mixes fast-paced action with roguelite elements. Take on increasingly difficult arenas as you unlock new ships, upgrades, synergies, and more! Think you have what it takes to survive?
- 7

X Invader
Single-player alternative to TETRAGUN — playable solo, no multiplayer required. Shares Action and Strategy with TETRAGUN.
X Invader is an action roguelite where you hack into big corporations' servers. Use add-ons from fellow hackers to defeat monsters. Powerful, cute bosses guard these servers!
- 8

Gacha Fever
Single-player alternative to TETRAGUN — playable solo, no multiplayer required. Shares Action and Indie with TETRAGUN.
Gacha Fever is a suvivors like in a cute and colorful universe. You will fight waves of monsters with various weapons, from the machine gun to the magical girl wand and the Bubble Tea Canon ! Just be careful of the area !