Pass stage 1

Use elemental damage to kill 500 enemies

Use bullet penetration to kill 500 enemies

Use ballistic damage to kill 500 enemies

Clear a stage with 1 max-level mercenaries

Build at least 10 turrets in a single battle

Collect 10000 materials

Use explosion damage to kill 500 enemies

Electric shock 1000 enemies

Pass stage 3

Kill 5000 enemies

Ignite 1000 enemies

Have 5 mercenaries with penetration weapons at the same time

Buy 200 items in the store in total

Pass 100 waves in total

Kill 10000 enemies

Combat stat luck reaches 40

Use critical hit to kill 500 enemies

Freeze 1000 enemies

Use energy damage to kill 500 enemies

Reroll the store 100 times in total

Use elemental damage to kill 5000 enemies

Pass stage 5

Ignite, freeze or paralyze 10000 enemies in total

Combat stat damage reaches 80%

Pass stage 7

Combat stat interest reaches 80%

Electric shock 10000 enemies

Combat stat atk speed reaches 100%

Use ballistic damage to kill 5000 enemies

Ignite 10000 enemies

Pass stage 10

Combat stat hp reaches 15000

Use explosion damage to kill 5000 enemies

Use critical hit to kill 5000 enemies

Freeze 10000 enemies

Generate 200 mines

Combat stat enemy speed reaches -30%

Kill 50000 enemies

Pass 500 waves in total

Combat stat elemental atk reaches 80

Use energy damage to kill 5000 enemies

Use critical hit to kill 10000 enemies

Combat stat magazine reaches 50

Use bullet bounce to kill 500 enemies

Combat stat engineering reaches 80

Have 5 mercenaries with explosion weapons at the same time

Combat stat critical reaches 70%

Pass stage 12

Kill 100000 enemies

Recycle 100 mercenaries in the shop

Combat stat range reaches 15

Combat stat ballistic atk reaches 80

Pass stage 14

Combat stat evasion reaches 65%

Have 5 mercenaries with split weapons at the same time

Pass stage 16

Clear a stage with 5 max-level mercenaries

Kill 200000 enemies

Combat stat Regeneration reaches 100

Finish a stage with 2000 materials remaining

Pass stage 18

Have 5 mercenaries with bounce weapons at the same time

Combat stat armor reaches 50

Combat stat energy atk reaches 100

Clear a stage with the cover destroyed

Pass stage 20

Combat stat enemy speed reaches 50%

Kill 500000 enemies

Kill 1000000 enemies