Microlite '81 now is out in a "complete" Beta edition. The author writes:
The public beta of Microlite81 Complete is now available for download and comment. Microlite81 Complete is intended to be standard Microlite81 with more complete descriptions of spells, monsters, and magic items and a few extras like an example of play and instructions for GMs which will hopefully make the game more friendly to players with less experience with old school gaming. Microlite81 Complete allows the GM to select which version of the "core game rules" to use (the standard B/X-like rules fromMicrolite81 or the B/X-like rules with the author's house rules from the early 1980s added as in Microlite81 Extended).