
Build rail networks, deploy battle trains, and use turret enchantments to create mobile fortresses. Hold the line in the wasteland left by the Sinking, uncover the floating city's dark truth, and choose between conviction and rebellion.
Loopstructor 2: Skyspine is the full-fledged sequel to Loopstructor, bringing a fresh approach to tower defense built around track planning. Nuclear devastation has left the surface in ruins, but the world below is no safe haven. As creatures swarm your position, your defenses take the form of war trains racing along looping tracks. Plan their routes, combine your turrets, and bring the battlefield under fire.
Connect stations across the battlefield to build a loop for each war train. Concentrate your fire in one area, or spread your trains across several routes to meet the swarm. You decide where the turrets go and where the trains run. Every lap brings another chance to strike.
Send steam turrets into battle, sweep through swarms with chain attacks, or rain down missiles and arcing shots. Different turret and upgrade combinations open up different ways to fight. With each choice of three rewards, strengthen a favorite setup or take your build in a new direction. Turn one choice after another into a train formation that packs a punch.
More grounded environments and striking creature designs give the underground battlefield a new look. Turrets now show different sides as they rotate to track enemies and open fire from moving trains. Up close, watch the machinery turn and the creatures advance. Pull back to see your entire formation trading fire with the swarm.
9 classes offering different combat choices
Over 40 turrets: combine steam, chain attacks, missiles, and more to build your own fleet
100+ relics to expand your build options
Plan your own rail loops: connect stations, route multiple battle trains, and cover the battlefield with moving defenses
Roguelike builds with a choice of three each round: combine turrets, enchantments, and upgrades to shape your playstyle
Endless Random Mode
Monthly Challenge Mode
Minimum Requires a 64-bit processor and operating system OS *: Windows 7 SP1 or newer Processor: Dual Core 2.0 GHz or better Memory: 16 GB RAM Graphics: GTX 960 or higer DirectX: Version 11 Network: Broadband Internet connection Storage: 2 GB available space Recommended Requires a 64-bit processor and operating system
Minimum OS: macOS 10.12 (Sierra) or newer Processor: M series Memory: 8 GB RAM Graphics: Intel HD Graphics 3000 or better, OpenGL 3.2+ support Network: Broadband Internet connection Storage: 2 GB available space
Minimum OS: Ubuntu 18.04 LTS or newer (SteamOS 3.0+) Processor: Dual Core 2.0 GHz or better Memory: 2 GB RAM Graphics: OpenGL 3.2+ compatible GPU (512 MB VRAM) Network: Broadband Internet connection Storage: 2 GB available space