Celtreos is a love letter to the classic side-scrolling 'shmup' (shoot 'em up) genre. If you grew up playing Gradius or R-Type, you’ll feel right at home here. It’s got all the hallmarks: the tiny ship navigating through tight corridors, screen-filling bosses, and a dizzying array of power-ups. What makes Celtreos unique for mobile is the sheer amount of customization. You can choose from 10 different ships and actually customize where your gun mounts are located, which changes how you tackle each level.
The game is also surprisingly rich in content, featuring over 12 stages with their own unique soundtracks and enemy patterns. I particularly enjoyed the fact that the levels have vertical space beyond just one screen, giving it a sense of scale often missing in mobile shooters. It can be quite difficult, but the inclusion of 'Quick Game' modes and adjustable difficulty makes it accessible for both veterans and newcomers to the genre.
Available on: Apple TV, iPhone, iPad, iPod
Version 2.1Wed Feb 04 2026
• New ship types are available!
• Artwork and animation improvements.
• Improvements to user interface elements.
One or two players; game controller required.
“Celtreos” is like the space shooters of decades past: tiny ship, big weapons, waves of foes, power-ups and obstacles.
Music, Sound and Voice
• 30 different songs (45 minutes of music!)
• You can even play your own music and auto-next-song for key game events
Stages
• Over 12 stages: a city, space station, ocean and more
• Horizontal scrolling but more than one “screen” of vertical space
• Start from any stage you want!
• Each stage ends with a challenging boss
• Wall layouts and spawn patterns are partially randomized
Weapon Arrays, Special Moves, Power-Ups and More
• Choose from a huge arsenal of weapons and special abilities
• 7 different ships to choose from
• In-game power-ups with weapons, defenses and temporary powers (like Rapid Fire)
• Power-down orbs with temporary inconveniences (like Weapon Freeze)
Additional Configuration Options
• Set number of lives, and number of times that special abilities can be used
Requires iOS 13.0 or later. Compatible with iPhone, iPad, and iPod touch.1-2 players, game controller support. NO in-app purchases. ~45 minutes of music! 13 detailed stages, partly-random, with bosses. Tons of weapons, guards & special moves.
One-player game, OR two players if you have a game controller.
“Celtreos” is like the space shooters of decades past: tiny ship, big weapons, waves of foes, power-ups and obstacles.
Music, Sound and Voice
• 30 different songs (45 minutes of music!)
• You can even play your own music and auto-next-song for key game events
Stages
• Over 12 stages: a city, space station, ocean and more
• Horizontal scrolling but more than one “screen” of vertical space
• Start from any stage you want!
• Each stage ends with a challenging boss
• Wall layouts and spawn patterns are partially randomized
Weapon Arrays, Special Moves, Power-Ups and More
• Choose from a huge arsenal of weapons and special abilities
• 10 different ships to choose from
• Customize ship properties, such as gun mount locations
• In-game power-ups with weapons, defenses and temporary powers (like Rapid Fire)
• Power-down orbs with temporary inconveniences (like Weapon Freeze)
Additional Configuration Options
• Set number of lives, and number of times that special abilities can be used
• Set graphics quality to one of three levels, and default ship speed




















Celtreos is a retro-inspired horizontal space shooter that emphasizes customization and variety. Players can select from 10 distinct ships and a massive arsenal of weapons and special abilities. The game features 12 diverse stages—ranging from space stations to underwater ruins—each culminating in a challenging boss fight. With a 45-minute original soundtrack and partially randomized spawn patterns, Celtreos offers a fresh take on classic 'shmup' gameplay for modern devices.
12+ sprawling stages with massive bosses
10 playable ships and hundreds of weapon combinations
Original 30-song soundtrack (45 minutes of music)
Configurable difficulty, lives, and ship speed
Support for game controllers and 2-player mode
Different ships have different speeds and hit-boxes. If you're a beginner, look for ships with more gun mounts to provide a wider spread of fire. If you're going for a high score on Hard, a smaller hit-box is vital for dodging bullet hell patterns.
Celtreos features both helpful power-ups and 'Power-down orbs.' Be careful not to fly blindly into every glowing item; some can freeze your weapons or slow your ship down temporarily. Learn the icons to avoid a quick death.
Yes, Celtreos supports game controllers and even offers a 2-player mode if a controller is connected.