Unnkulia One-Half: The Salesman Triumphant, AND Unnkulia Zero: The Search for Amanda (playable demo). Both are version 1.0, by D. A. Leary. [file is linked from games/atari-ST/unnkhz10.arc]
Unnkulian Underworld: The Unknown Unventure version 3.0 by D. A. Leary. [file is linked from games/atari-ST/uu1v301.arc]
Unnkulian Unventure II: The Secret of Acme version 3.0 by David M. Baggett. [file is linked from games/atari-ST/uu2v30.arc]