In search of faster transportation, people invented bicycles, cars, etc. But continued advances eventually opened a portal. The portal allows instantaneous movement between houses, and then eventually the continents. But this was not enough and people began to construct portals between the planets. On one such planet were monsters. Crowds of evil beings have infiltrated our world. Destroy the monsters and close the portal.

Control keys:
F - Pick up weapons, ammo
1,2,3 ... Change weapons
WASD - Character movement
SPACEBAR - Jump
SHIFT - Sprint
Esc - Exit to the menu
LKM - Shoot