The Riftbreaker is a base-building survival game where you play as Captain Ashley Nowak in a powerful mech suit, establishing a base on the alien planet Galatea 37 to build a rift portal back to Earth. The game uniquely blends hack-and-slash ARPG combat (you personally fight alien hordes in your mech) with tower defense and base management. Your mech swaps between weapons in real-time while your base's automated defenses handle waves of alien attackers. Research new technologies across multiple alien biomes, manage power grids and resource chains, and hack through thousands of aliens. It's Factorio meets Diablo.
Picking the right build determines how your experience plays out. These builds are ranked by overall effectiveness — factoring in damage, survivability, gear requirements, and how well they scale into endgame.
Quick Rankings
| Build | Tier | Playstyle | Core Gear |
|---|---|---|---|
| Combat Build | S | Fight alien hordes in your mech, swap weapons for different enemy types, dash through crowds. | Flamethrower, Railgun, Dash upgrade, Damage mods |
| Mining Build | A | Rapidly establish mining outposts, transport resources, fund faster research and building. | Mining tools, Resource scanners, Outpost prefabs, Transport drones |
| Research Build | A | Explore biomes for research samples, prioritize technology advancement, build advanced defenses early. | Research stations, Biome samples, Analysis equipment |
| Defense Build | S | Build layered defenses with overlapping fire zones, ensure power and ammo supply, let towers handle waves. | Multiple tower types, Walls, Power generators, Ammunition factories |
| Balanced | A | Develop all aspects evenly, adapt to immediate needs, steady progression. | Balanced weapon loadout, Moderate defenses, Adequate mining |
S-Tier: Combat Build
Max mech weapon damage and swap between weapons rapidly. Combat builds can clear alien waves without tower support, but bases still need defenses for when you're exploring. The Flamethrower + Railgun combo handles both hordes and heavy enemies.
Core Setup
| Slot | Choice | Why |
|---|---|---|
| Primary Equipment | Plasma Sword | A melee mech weapon with wide swings that hit multiple enemies. |
| Core Gear | Flamethrower, Railgun, Dash upgrade, Damage mods | Maximizes build potential |
| Stat Priority | Weapon damage, Fire rate, Dash cooldown | Optimal scaling |
| Key Mechanic | base defense | Build walls, towers (gatling, laser, plasma, artillery), and traps to defend your base against periodic alien attack waves. |
How to Play Combat Build
Fight alien hordes in your mech, swap weapons for different enemy types, dash through crowds.
Max mech weapon damage and swap between weapons rapidly. Combat builds can clear alien waves without tower support, but bases still need defenses for when you're exploring. The Flamethrower + Railgun combo handles both hordes and heavy enemies.
What makes this build work: The synergy between Plasma Sword and base defense creates a gameplay loop that outperforms other options. Core gear like Flamethrower, Railgun, Dash upgrade, Damage mods amplifies this further.
Pros:
- Highest overall performance
- Clear stat priority (Weapon damage, Fire rate, Dash cooldown) makes gearing straightforward
- Works in all content types
Cons:
- Popular pick, resources may be contested
- Needs specific gear to reach full potential
A-Tier: Mining Build
Prioritize resource extraction speed and mining equipment. Mining builds establish outposts faster, gathering resources for rapid tech advancement. Sacrifice some combat power for economic advantage.
Core Setup
| Slot | Choice | Why |
|---|---|---|
| Primary Equipment | Minigun | A rapid-fire weapon with sustained DPS. |
| Core Gear | Mining tools, Resource scanners, Outpost prefabs, Transport drones | Maximizes build potential |
| Stat Priority | Mining speed, Resource storage, Outpost efficiency | Optimal scaling |
| Key Mechanic | mech suit | Your mech has 2 weapon slots (swappable in real-time), a dash ability, and special abilities. |
How to Play Mining Build
Rapidly establish mining outposts, transport resources, fund faster research and building.
Prioritize resource extraction speed and mining equipment. Mining builds establish outposts faster, gathering resources for rapid tech advancement. Sacrifice some combat power for economic advantage.
What makes this build work: The synergy between Minigun and mech suit creates a gameplay loop that offers reliable performance. Core gear like Mining tools, Resource scanners, Outpost prefabs, Transport drones amplifies this further.
Pros:
- Most versatile option
- Clear stat priority (Mining speed, Resource storage, Outpost efficiency) makes gearing straightforward
- Works in all content types
Cons:
- Lower peak damage than S-tier
- Needs specific gear to reach full potential
A-Tier: Research Build
Rush research technologies for advanced weapons and defenses. Research builds unlock powerful late-game options faster (nuclear power, plasma towers) but may lack early combat power.
Core Setup
| Slot | Choice | Why |
|---|---|---|
| Primary Equipment | Flamethrower | Short-range AoE fire damage that applies burn DoT. |
| Core Gear | Research stations, Biome samples, Analysis equipment | Maximizes build potential |
| Stat Priority | Research speed, Technology unlocks, Biome sample collection | Optimal scaling |
| Key Mechanic | resource extraction | Mine Carbonium, Ironium, Cobalt, Uranium, and rare materials from deposits across the map. |
How to Play Research Build
Explore biomes for research samples, prioritize technology advancement, build advanced defenses early.
Rush research technologies for advanced weapons and defenses. Research builds unlock powerful late-game options faster (nuclear power, plasma towers) but may lack early combat power.
What makes this build work: The synergy between Flamethrower and resource extraction creates a gameplay loop that offers reliable performance. Core gear like Research stations, Biome samples, Analysis equipment amplifies this further.
Pros:
- Best survivability
- Clear stat priority (Research speed, Technology unlocks, Biome sample collection) makes gearing straightforward
- Works in all content types
Cons:
- Slower clear speeds
- Needs specific gear to reach full potential
S-Tier: Defense Build
Focus on base defense with overlapping tower coverage, walls, and automated systems. Defense builds create impregnable bases that handle waves without player intervention, freeing you to explore.
Core Setup
| Slot | Choice | Why |
|---|---|---|
| Primary Equipment | Railgun | A charged single-shot weapon dealing massive piercing damage. |
| Core Gear | Multiple tower types, Walls, Power generators, Ammunition factories | Maximizes build potential |
| Stat Priority | Tower damage, Wall HP, Power generation, Ammunition supply | Optimal scaling |
| Key Mechanic | biome research | Four alien biomes (Jungle, Desert, Acid, Volcanic) contain unique resources and enemies. |
How to Play Defense Build
Build layered defenses with overlapping fire zones, ensure power and ammo supply, let towers handle waves.
Focus on base defense with overlapping tower coverage, walls, and automated systems. Defense builds create impregnable bases that handle waves without player intervention, freeing you to explore.
What makes this build work: The synergy between Railgun and biome research creates a gameplay loop that provides a unique approach. Core gear like Multiple tower types, Walls, Power generators, Ammunition factories amplifies this further.
Pros:
- Strong in group/team content
- Clear stat priority (Tower damage, Wall HP, Power generation, Ammunition supply) makes gearing straightforward
- Excels in its niche
Cons:
- Weaker solo performance
- Requires deep game knowledge
A-Tier: Balanced
Equal investment in combat, mining, research, and defense. The safest approach for first playthroughs. No single weakness but no dominant strength either.
Core Setup
| Slot | Choice | Why |
|---|---|---|
| Primary Equipment | Nuclear Launcher | The most powerful weapon in the game — launches a nuclear warhead that devastates a huge area. |
| Core Gear | Balanced weapon loadout, Moderate defenses, Adequate mining | Maximizes build potential |
| Stat Priority | Balanced across all categories | Optimal scaling |
| Key Mechanic | portal building | The ultimate goal — build a rift portal requiring resources from all biomes. |
How to Play Balanced
Develop all aspects evenly, adapt to immediate needs, steady progression.
Equal investment in combat, mining, research, and defense. The safest approach for first playthroughs. No single weakness but no dominant strength either.
What makes this build work: The synergy between Nuclear Launcher and portal building creates a gameplay loop that provides a unique approach. Core gear like Balanced weapon loadout, Moderate defenses, Adequate mining amplifies this further.
Pros:
- Unique, rewarding playstyle
- Clear stat priority (Balanced across all categories) makes gearing straightforward
- Excels in its niche
Cons:
- High skill floor, punishing when misplayed
- Requires deep game knowledge
Build Progression Path
- Start with Mining Build — the most forgiving option for learning the game
- Transition to Combat Build once you understand core mechanics and have access to Plasma Sword
- Keep a Research Build setup for content that keeps killing you
- Try Balanced for a fresh experience once you've mastered the basics
Gearing Tips
- Invest in your primary equipment first — it gives the biggest power spike
- Walls and towers need overlapping fields of fire — place towers behind walls so they shoot over them, creating layered defense that enemies must pass through.
- Research new biomes before exploring them — biome-specific threats can destroy unprepared expeditions. Unlock appropriate resistances first.
- Don't spread upgrade resources across multiple builds until endgame
See our tier list for current meta rankings, or the beginner's guide if you're just getting started.
