What are all of the masks you can unlock in Metal Gear Solid 4

Big Boss (Solidus) (Big Boss Emblem Needed), Mgs1 (Get to act four complete/ exit the heliport on shadow moses), Face Camo (Defeat Laghing Octopus), All 4 beuties (Use Tranqs On Them), Radien A and B (Shock/ ram naomi and Sunny in mission briefing with mark 2), Roy Cambell (go to mission Brefing at start of game go to act 1 and ram roy with mk. 2), young snake and young snake with bandanna (start act 3)
And i think that's all sorry if i missed some
Oh yeah otacon face Camo: Ram him with mark 2 in mission brefing