Kill 500 aliens.
Kill 200 aliens with grenades.
Kill 10 boss aliens.
Kill 50 aliens with leg kicks.
Destroy 10 parts of buildings with explosives.
Break all glasses of the petrol station.
Use all weapons in a single game.
Collect all petrol cans.
Complete the game in day mode.
Complete the game in night mode.
999
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925726
273979
205830
93317
62756
10583