My Collection:
ALIEN P&S single platter (1992) laserdisc release.
ALIEN Special Widescreen Collector's Edition (1992) laserdisc boxed set.
ALIEN THX (1995) laserdisc release (with the alternate audio).
ALIENS Special Widescreen Collector's Edition (1991) laserdisc boxed set.
ALIEN 20th anniversary DVD (R1 and R4).
ALIENS DVD (R1 and R4).
ALIEN LEGACY (2000) box set (R4).
ALIEN QUADRILOGY (2003) box set (R4).
ALIEN Director's Cut (2003) DVD (R4).
ALIENS (2003) DVD (R4).
ALIEN ANTHOLOGY Blu-ray (2010) limited edition packaging (RB).
ALIEN ANTHOLOGY Blu-ray (2010) box set (RB).
ALIEN 40th anniversary 4K Blu-ray.
PROMETHEUS Blu-ray 3D set (RA and RB).
ALIEN: COVENANT Blu-ray (RB)
PROMETHEUS 4K Blu-ray.
ALIEN: COVENANT 4K Blu-ray.
To sum it all up: At this point in time, the ANTHOLOGY set is still the best release for bonus features. And the 4K 40th anniversary ALIEN is the best way to experience the film at home.