DL#1 is Missile Command version 2.3, released on August 18, 1984
DL#2 is v1.2 and Requires 512x342 resolution, fixed in 2.3
DL#3 is some sort of in-between (beta?) version that says both 1.2 and
2.3

Compatibility
Architecture: 68k

Although created for Macintosh Plus (Mini vMac), this game runs fine
up to Mac OS 9 in SheepShaver.