/vr/ - Retro Games

Lagrange L-2 is one of the most surprising text adventures I've seen, released in 1984 for the Sharp X1 on tape. You play as a shipwrecked pilot just within reach of an abandoned toroidal space colony behind the Moon (in L2, duh); the game has password saves and supports Roman-character inputs, as well as including pre-defined commands and some inventive beeper sounds.

X1: http://polsy.org.uk/play/nico/?vidid=sm4492109
PC-88 walkthrough: http://www.nicovideo.jp/tag/ラグランジュL2

First puzzle's opening an emergency airlock, where any and all actions you take deplete your oxygen gauge. Game has lotsa small details uncommon in that era, like simulated terminal consoles and HUD descriptions for some puzzles. You get a cute girl as sidekick just like in Bond Soft's sci-fi adventures; the story revolves around (predictably) a rogue AI having killed the former inhabitants, trying to spread its dominion through robots and hacking other stations (which forms the plot of D-Side, the sequel).