Half-Life Alpha developer playthrough on YouTube - Recorded from the included demo files.

Half-Life trailer from GameStar magazine on YouTube - Features footage at 00:09 and 00:29.

Half-Life: Preliminary Findings - Introduction on YouTube - Features footage at 00:25.

Half-Life trailer from 1997 on YouTube - Features footage of The Portal Device at 00:11, 00:23, and 00:56.

↑ 2.0 2.1 Half-Life Alpha Walkthrough ( WalkThru.doc) (September 4, 1997).

↑ Early Test Facility on Brett Johnson's personal website (June 5, 2016) ( archived).

You can help by describing the files below. However, Decay features a device called the Displacement Beacon which was designed to open a portal and capture specimens on Earth without the necessity of traveling to the alternate dimension, similar to the Portal Device's original intended purpose.Īt least one image in this gallery is not captioned. It started in 2000 as a HL enhancement and over almost 15 years turned into a game comparable. XHL/XDM is a Half-Life modification with quite a long history. While a majority of the levels were completely discarded, the broken airlock in c1a1 was reused in Unforeseen Consequences, and the flooded laboratory in c1a1b was moved to the chapter Office Complex.ĭespite having similar placements in their respective revisions of Half-Life, the Portal Device should not be confused with the final game's Anti-Mass Spectrometer as the latter is only capable of examining crystal specimens. X-Half-Life/XDM 3.0.3.7: all multiplayer games come together XDM 11 comments. It eventually evolved into Unforeseen Consequences which shares the same general premise. The chapter was cut following the game's significant reworking in late 1997. Optional paths to progress through the labs are presented, and a number of puzzles must be navigated in order to proceed. The player, initially only armed with a crowbar, was to battle his way through the now-ruined and infested labs to escape. The level begins in the main control room following the disaster. According to the chapter summary, no human has ever ventured through the portal before.Īn accident fractures the fabric of space-time and allows aliens to invade through the fissures. It's been used to capture specimens without the danger of actually traveling there. &0183 &32 Beta-Prograne 160 mg Sustained-Release Capsules and Half Beta-Prograne 80 mg Sustained-Release Capsules, as with other beta-adrenoceptor blocking drugs, must not be used in patients with any of the following conditions: hypersensitivity to the active substance or to any of the excipients listed in section 6. The Portal Device itself is a machine designed to open an interdimensional portal between Earth and an alternate dimension. This chapter is largely made up of a series of laboratories and holding cells where specimens captured from the portal have been kept for study.

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