Just finished Halo CE, and although it reports that I have completed 10/10 missions, the game still lists Two Betrayals and Keyes as undefeated. This is listed under the achievements section. I still have not received an achievement for Two Betrayals Terminal. Hopefully I’m not the only one, and 343 notices this bug.
yea I’m having the same problem broken playing halo 2 on legendary it say completed 11/15 missions on legend but the achievements say I’ve only done the first 2 the skulls and terminal achievements popped my though which is weird