- Salvage
- The run currency dropped by kills, spent at the Fleet Dock. Resets when you die.
- Upgrade Token
- Spent between levels on the run upgrade tree.
- Heat
- Every shot generates heat. Fill the bar and the weapon overheats and locks until it cools. Each weapon has its own heat cost.
- Overheat
- The lockout state when the heat bar fills. Pace your fire to avoid it.
- Fleet Dock
- The between-boss shop where Salvage buys ship systems and, in the campaign, new weapons.
- Fleet
- The campaign flotilla of 200 ships and 2,000 souls you escort. It takes losses when enemies get past you.
- Sector
- A themed region of space. There are five, each with its own palette, enemies and boss, changing every 30 levels.
- Tier
- A per-enemy rank that multiplies its stats and recolors it. Tiers climb the deeper you go.
- Contract
- An optional campaign mission with special rules and rewards, offered by a member of your crew.
- Salvage Magnet
- An upgrade that pulls pickups toward your ship so you collect more without chasing.