Robots, parts & fusion
Six-part builds, Scrap upgrades, Fusion Lab, Reroll, Reforge, and Drones.
Parts and fighters
Build a robot from six parts, upgrade it with Scrap, then spend Cash on Fusion Lab, Reroll Stats, Reforge Parts, and Drones. Luck titles help the lever. Master Builder counts any build toward 60.
Part slots
Build Robot uses six slots: Head, Torso, Left Arm, Right Arm, Left Leg, Right Leg. Parts roll HP, damage, defense, and crit. Rarity climbs Common through Rare and higher.
| Slot | Notes |
|---|---|
| Head | HP, damage, and crit from the part roll. |
| Torso | Core body piece. Reforge can roll a new bonus. |
| Left Arm | Arm slot. Separate from Right Arm. |
| Right Arm | Arm slot. Separate from Left Arm. |
| Left Leg | Leg slot. Build fills 6/6 parts. |
| Right Leg | Leg slot. Build fills 6/6 parts. |
Systems
Build, lever, Scrap upgrades, Fusion Lab (8% of each fuel robot), Reroll Stats, Reforge Parts, Drones, Ultra Dice, and Update 1 Index / Spin Wheel. Screenshots below walk through Fusion, Reroll, and Reforge.
| System | Notes |
|---|---|
| Build Robot | Equip six parts (Head, Torso, Arms, Legs). Stats show HP, DMG, Defense, Crit. AUTO can pick AVG / HP / DMG / Crit. |
| Lever | Parts shop. Pull or buy rolls. Collector tracks purchased parts; Lever Lord tracks pulls. |
| Upgrade | Spend Scrap on the robot you fight with. Engineer tracks 500 upgrades. |
| Fusion Lab | One robot Evolves. Two fuel robots are Used Up. Main takes 8% of each fuel robot's stats. Costs Cash. |
| Reroll Stats | Reroll Health, Attack, Defense, Critical for a new value between -20% and +20%. Costs Cash. |
| Reforge Parts | Pick a part and reforge its bonus from -20% to +20%. Costs Cash. |
| Drones | Roll kinds (Armor, Carry, Thorns, Boss Damage, Cash, Scrap, Damage…). Each kind about 1 in 11. Carry adds scrap capacity. Roll costs Cash. |
| Ultra Dice | Separate roll from the lever. Dice Master needs 100 Ultra Dice rolls. |
| Index / Spin Wheel | Coming in Update 1. Robot rows and wheel rewards land here after they appear in the game. |
Fusion Lab
Pick one robot to Evolve and two fuel robots that get Used Up. The main robot takes 8% of each fuel robot's stats (Health, Attack, Defense). Fusion costs Cash. Change picks, then Fuse when the gains look worth the fuels you burn.
Reroll Robot Stats
Reroll Health, Attack, Defense, and Critical for a new random value between -20% and +20% on the selected robot. Each reroll costs Cash. Golden Dice is the Robux path that locks +20% on all stats.
Reforge Robot Parts
Pick one part (Head, Torso, Arms, or Legs) and reforge its bonus to a new value between -20% and +20% of what that part gives. Reforge costs Cash. Golden Hammer can force +20% on one part.
Drone rarity
Drone rolls cost Cash. Each kind is about 1 in 11. Carry raises scrap capacity. Rarity odds sit on the Drones panel.
| Rarity | Chance |
|---|---|
| Common | 50% |
| Uncommon | 30% |
| Rare | 14% |
| Epic | 5% |
| Legendary | 1% |
FAQ
Should I build many robots or one strong one?
Early on, one Scrap-upgraded fighter clears Arena floors. Use spare builds for Master Builder and later Fusion Master.
What does Fusion Lab do?
Pick one robot to Evolve and two fuel robots that get Used Up. The main robot takes 8% of each fuel robot's stats. Fusion costs Cash.
Cash or Scrap for robot power?
Scrap upgrades robots. Cash pays Fusion, Reroll Stats, Reforge Parts, and Drone rolls. Check each panel for the price.
What does Luck do?
Luck helps the lever favor better parts. Collector (+22% Luck) is the top Luck title on the list.
Where is the full robot list?
Update 1 adds Index. Until that list is in the game, this page stays on systems. No empty tier list.