Bone Shop & Upgrades

How the Bone Shop Works

The Bone Shop is your meta-progression hub between runs. Spend bones earned from runs on permanent upgrades that apply to every character and every arena. Upgrades are organized into five categories:

Each upgrade has multiple levels (typically 3-5). Costs increase with each level. You can reset your bone spending at any time for a small fee, so don't worry about making permanent mistakes.

Upgrade Priority Order

Follow this order to maximize your power gain per bone spent. This is optimized for new players working toward their first Wave 20 clear.

Tier 1 — Buy these first (0-100 bones)

1. Max Health Lv.1-3 — More health = more room for error. The single biggest survivability boost.
2. Starting Damage Lv.1-2 — Faster wave clears mean less time taking damage.
3. Blood Magnet Lv.1 — Automatically pulls blood drops toward you, making healing effortless.

Tier 2 — Core power (100-300 bones)

1. Fire Rate Lv.1-2 — More bullets = more coverage and faster kills.
2. Bone Bonus Lv.1-2 — Earn more bones per run, accelerating all future progression.
3. Max Health Lv.4-5 — Finish capping your health pool.
4. Starting Damage Lv.3 — Push damage to comfortable levels.

Tier 3 — Quality of life (300-600 bones)

1. Gold Bonus Lv.1-2 — More gold means more in-run upgrades per run.
2. Move Speed Lv.1 — Slight speed boost makes kiting easier.
3. Better Chests Lv.1 — Improves the quality of items found in chests.
4. Projectile Count Lv.1 — Extra projectile adds significant damage.

Tier 4 — Endgame & unlocks (600+ bones)

1. Unlock remaining characters (see characters guide)
2. Unlock additional arenas
3. Max out remaining offensive upgrades
4. Purchase cosmetic skins

Farming Bones Efficiently

Bones are earned based on wave reached and enemies killed. Higher waves give exponentially more bones. Here's how to maximize your bone income:

Bone farming strategies

• Push as far as possible — Wave 15 gives roughly 3x the bones of Wave 10. Dying at Wave 14 is better than bailing at Wave 10.
• Use Bone Bonus upgrades — Each level adds a percentage to all bone earnings. This compounds over many runs.
• Play arenas you're comfortable in — A long run in an easy arena beats a short run in a hard one for bone income.
• Complete daily quests — Daily quests offer bonus bones for specific objectives like "Kill 200 enemies" or "Reach Wave 8".
• Boss kills give bonus bones — Every 5th wave is a boss; defeating them grants a bone bonus on top of wave rewards.

Pro Tips & Common Mistakes