A Half-Life mod you can play either solo or online with friends. The idea is pretty simple: headcrabs keep appearing on the map and you have to kill them with the crowbar, while their number gradually grows.

Download:



Download from the official site:




GAME RULES
  • You start the game with 5 lives. Every time you die, you can respawn until you run out of lives. When that happens, the game is over (in multiplayer the game ends when all players are dead).
  • For every 40 crabs you kill, you get extra health.
  • For every 100 crabs you kill, you get an extra life.
  • Your health constantly regenerates (2 HP/sec).
  • The maximum number of live crabs on the level gradually grows.
  • The crabs' health and the damage they deal also gradually grow.
  • Killing several crabs at once gives you a COMBO.
  • A combo temporarily boosts the crowbar's power; the bigger the combo, the longer the boost lasts.
  • Killing crabs earns you "rage". Combos give bonus "rage" points.
  • When your "rage" is off the charts, you can activate rage mode by pressing the RELOAD key and deal 16x damage.
  • The first crowbar hit deals full damage; the following swings deal half.
  • The crowbar's secondary attack hits harder but less often.
  • The crowbar gradually gets upgraded: it deals more damage and rage mode lasts longer.
  • If you kill a crab that is chasing you with something other than the crowbar, you get bonus points.


GAME MODES
  • Ladder - different types of crabs appear one after another, in "waves".
  • Random - all types of crabs appear mixed together. Ladder mode switches to this mode once the "waves" of all types are done.


POWER-UPS
  • Invulnerability - the player is physically immune to any damage
  • Invisibility - headcrabs don't react to the player
  • Regeneration - health regenerates 3 times faster (6 HP/sec)
  • Lightning – while attacking, the crowbar periodically strikes the nearest target with a lightning bolt. The bolt chains and hits up to 8 targets.
  • Power-ups last 20 seconds. They respawn after 1 minute, give or take a few seconds. Maps can have power-ups of a specific type as well as a random power-up, which may change with each respawn. To disable power-ups, use the console variable hcf_allowpowerups (see HLDS how-to.txt).



Screenshots:
Headcrab Frenzy

Headcrab Frenzy

Headcrab Frenzy

Headcrab Frenzy


Links:
Official site
ModDB page