There are a total of 8 toys available in Halo 2 Anniversary, all located in the later missions of the campaign. They are listed below:
[
0:09] - Master chief - Mission: Delta Halo
[
1:43] - Prophet - Mission: Regret
[
2:38] - Arbiter - Mission: Sacred Icon
[
3:20] - Tartarus - Mission: Quarantine Zone
[
3:55] - Cortana - Mission: Gravemind
[
5:11] - Librarian - Mission: Uprising
[
7:31] - Rampant Cortana - Mission: High Charity
[
8:12] - Didact - Mission: The Great Journey
You will also unlock the following achievements along the way: