Illusions is the debut studio album of Sadus originally released in 1988. It was re-issued on CD by Roadrunner Records as Chemical Exposure in 1991, and again in 2006 with two bonus tracks.
It was reissued by Displeased Records in 2007 with eight bonus tracks and a video clip.
In his review of the album, Eduardo Rivadavia of AllMusic assessed that stylistically, Illusions "stood balanced on a knife's edge between the already fading (though few were aware of it) thrash scene and the death metal movement about to replace it. [...] Tracks like "Certain Death," "Torture," "Fight or Die," and even the rather funny "Sadus Attack" played by the former style's unfailingly frantic, break-neck speed rules, rarely ever slowing down to preempt the latter's greater dynamic diversity. But the young Sadus players' already awesome technical abilities clearly belonged with the next generation of post-thrash deathsters." Hence, the material on Illusions is considered by critics to be technically superior to many other Bay area thrash bands of the time.
Eduardo Rivadavia of AllMusic gave the album four stars out of five, commending the musicianship and expressing his belief that the band surpassed many Bay area trash metal bands technically.
Album artwork by Rickey-Lee Rogers