Alien Carnage

In Alien Carnage, Harry launches into alien-infested territory with a jetpack powered by the exact same fuel tank as his flamethrower, forcing you to balance your aerial movement against your weapon reserves.

The shared fuel tank makes every leap a gamble

In 1993, developers John Passfield and Robert Crane handed players control of Halloween Harry, an intergalactic commando dispatched from Space Station Liberty to halt a full-scale invasion of Earth. The core trick of Alien Carnage is its tight resource system. Your primary flamethrower consumes the very gas needed to lift Harry off the floor, which turns basic vertical navigation into an ongoing arithmetic problem.

If you get trigger-happy against early wave mutants, you will drop directly into pit hazards or toxic pools when your jetpack runs dry mid-flight. Refilling means scouring levels for cash dropped by felled enemies, then feeding those coins into interactive ammo vendors scattered throughout the stages. Later armaments like guided missiles, grenades, micro-nukes, and the devastating Omega bomb offer clean range, but their limited ammo counts keep you tied to that central cash economy.

Movement feels heavy compared to standard runners of the period. Turning Harry around takes a fraction of a second longer than you expect, and fine-tuning landings on narrow platforms while managing thrust requires deliberate taps of the control keys rather than frantic holding.

Alien Carnage built its level design around forced exploration and hidden switches

The structure spans four distinct episodes containing five levels apiece, moving from slime-coated Sewers up into a Factory, through an Office Block, and finally onto the Alien Ship itself. You cannot simply dash to the end of a map. Every stage forces you to locate and free trapped human captives before the exit elevator unlocks, which turns the game into a sprawling rescue operation across maze-like corridors.

Progression relies heavily on hunting down switches and color-coded elevator keys. Secrets are tucked away behind optical illusions, including false walls and decorative waterfall graphics that conceal hidden alcoves loaded with extra coins and heavy weaponry.

The enemy roster escalates from green zombies and dripping ceiling slime to heavy alien shock troops. Each episode culminates in a heavy fight, including an encounter with an alien boss styled like Elvis Presley. The overall presentation pushed 256-color VGA modes to their limit, giving environments strong structural contrast between dingy sewer pipes and glowing control panels.

Spike traps, floaty physics, and wall-glitching mutants test your patience

For all its clever mechanics, the game carries several frustrating quirks that cost runs. Enemy placement can feel cheap, with slime dropping from off-screen ceilings straight onto Harry's head while you are mid-jump. On some stages, alien sprites clip directly into solid walls, shooting at you from inside the geometry where your weapons cannot harm them.

Backtracking to find a single missed hostage in a sprawling, multi-tiered level quickly grinds the action to a halt. If you clear out a corridor and miss one cage near the start, you are stuck walking back through quiet empty rooms just to hit a single switch. The dynamic MOD soundtrack punchily drives the initial action through a Sound Blaster card, but the short music loops get tiresome during long searches for lost civilians.

Players who ran out of patience back in the PC shareware days often resorted to typing cheat codes on their keyboards. Pressing B-I-G simultaneously instantly restores full health and jetpack fuel, while hitting Ctrl+R+E+N in early versions unlocks every weapon alongside temporary god mode.

How Apogee shifted the title away from seasonal shareware

When Interactive Binary Illusions and SubZero Software first published the title in late 1993, they called it Halloween Harry. Publisher Apogee Software worried that buyers browsing software racks in spring or summer would assume the game was a seasonal novelty tie-in. For its version 2.0 commercial release, Apogee rebranded the package as Alien Carnage to emphasize the heavy gunplay over the protagonist's festive name.

This action platformer arrived on store shelves right alongside rival PC side-scrollers, competing directly against titles like Duke Nukem II. While Duke focused on straightforward left-to-right shooting, Harry's focus on vertical jetpack navigation and resource management offered a distinctly different pace. A full narrative sequel titled Zombie Wars followed in 1996, though the original campaign was eventually released as freeware in 2007 by Passfield and 3D Realms.

Playing this classic MS-DOS game today

The core design holds up best when approached as a methodical balance of vertical movement and resource management. The floaty jumps and backtracking can grate, but calculating your flight paths around your remaining fuel while upgrading your arsenal at vendors creates a satisfying tactical rhythm. If you enjoy early 90s PC side-scrollers with aggressive level design, it delivers a sturdy challenge.

You can play Alien Carnage free in your browser right now, with nothing to install and no complex setup required. New players should remember to monitor their flame reserves closely before attempting long leaps over open pits, as running out of gas mid-air drops Harry straight down into danger.