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Headcrab Frenzy! achievements progress.
Complete "HCF_Killbox" arena.
35.6%
Complete "HCF_Dungeon" arena.
26.4%
Complete "HCF_Labmoar" arena.
25.2%
Complete "HCF_Range" arena.
23.9%
Complete "HCF_Factory" arena.
23.5%
Complete "HCF_Temple" arena.
23.5%
Exterminate 1500 generic headcrabs.
11.7%
Exterminate 2000 fast headcrabs.
11.4%
Exterminate 2500 fire headcrabs.
11.2%
Exterminate 3000 ice headcrabs.
11.0%
Exterminate 3500 poison headcrabs.
11.0%
Exterminate 4000 electric headcrabs.
10.9%
Exterminate 4500 ethereal headcrabs.
10.9%
Exterminate 5000 hallucinogenic headcrabs.
10.9%
Shoot 500 headcrabs using firearms.
12.6%
Perform 250 nice catches.
15.3%
Cause some disorder in the Museum.
53.3%
Spend 60 minutes in Frenzy mode.
11.8%
Regenerate 100,000 health points.
11.3%
Score 1,000,000 points in a single match.
12.8%
Perform a 25x combo.
23.5%
Survive all 8 "Ladder" waves.
36.4%
Survive 20 waves in "Ladder" game mode.
15.8%
Survive 20 waves in "Random" game mode.
12.9%
Don't be bitten at all during a single wave.
14.3%
Beat the game on "Easy" skill level.
14.9%
Beat the game on "Medium" skill level.
15.7%
Beat the game on "Hard" skill level.
13.7%
