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Portal Of Doom: Undead Rising – The Space‑Station Nightmare

Distress signals crackle over a derelict research outpost. You answer the call, only to find corridors drenched in blood, flickering lights, and the stench of decay. Experiments went wrong. Alien pathogens turned crew into relentless zombies. Every step is a fight for survival, every hallway a potential death trap. Portal Of Doom: Undead Rising blends horror, 3D immersion, and fast‑paced FPS action into a single, pulse‑pounding experience.

Mechanics

Control the chaos with a classic shooter layout. Move, aim, and react in real time.

  • Controls WASD or arrow keys to walk around
  • Mouse to look around
  • Left mouse button to fire
  • Right mouse button to aim
  • Mouse wheel to change weapon
  • R to reload
  • F to pick up an item
  • Left shift to run
  • Left Ctrl to crouch
  • X to prone
  • V to melee
  • Space to jump
Portal Of Doom: Undead Rising Gameplay

Strategy

Stay alive by mastering three core loops: conserve ammo, control the crowd, and upgrade your gear. Conserve ammo by switching to the melee hammer (V) when hordes close in. Zombies and alien hybrids share weak points—headshots on the undead, plasma cores on the extraterrestrials. Control the crowd with choke points; funnel enemies through air vents or narrow corridors before detonating explosives. Keep an eye on the HUD for oxygen levels; the station’s life support falters as you progress, forcing quick decisions. Upgrade your arsenal at supply stations scattered throughout the map. Each upgrade unlocks a new 3D visual effect—plasma bolts, incendiary rounds, or shockwave grenades. The longer you survive, the more intense the horror becomes: darkness deepens, enemy AI sharpens, and the soundtrack turns into a relentless, throbbing pulse. UfreeGames designed the progression to feel rewarding without ever slowing the FPS momentum.

Lock and load. Jump into the nightmare now and prove you can outlast the undead on a dying space station. Play Portal Of Doom: Undead Rising today and experience the ultimate horror‑FPS showdown.

Instructions:

Controls

  • WASD or arrow keys to walk around
  • Mouse to look around
  • Left mouse button to fire
  • Right mouse button to aim
  • Mouse wheel to change weapon
  • R to reload
  • F to pick up an item
  • Left shift to run
  • Left Ctrl to crouch
  • X to prone
  • V to melee
  • Space to jump
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