Super Robot Wars/K/Secrets

Unlockable	Condition to Unlock
Heine Westenfluss with GOUF Ignited	On stage 19, have Athrun attack Heine, and then have Athrun convince him.
Stella Loussier with Gaia Gundam	On stage 14A part 1, do NOT shoot down Shinn with Kira. On stage 14A part 2 do NOT shoot Shinn down at all. Then on stage 15A, do NOT shoot down Shinn, Rey and Talia. Rey and Stella will then join in stage 30 in the Fafner route when Minerva shows up via event.
Rey Za Burrel with Legend Gundam	On stage 14A part 1, do NOT shoot down Shinn with Kira. On stage 14A part 2 do NOT shoot Shinn down at all. Then on stage 15A, do NOT shoot down Shinn, Rey and Talia. Rey and Stella will then join in stage 30 in the Fafner route when Minerva shows up via event.
Felme with Bio-Ptera	Clear stage 27B (Zoids route) and she will join automatically.
Ken with Blade Gainer	On stage 15B part 2, do not let Lou fight with any of the mimic monsters. It will join after you clear stage 30C part 2 (Godanner route).
Michael Garret with Saudade of Sunday	On stage 8, let Van take out the Gadved (Doesn't matter if it is the first time or 2nd time). On stage 26A, let Vann take out Carossa. On stage 27, something about Van's kill counts. On stage 32 part 1, take out Woo and Fasalina first, then take out Michael. Joins after stage 32 part 1.
Fasalina with Dahlia of Wednesday	On stage 8, let Van take out the Gadved (Doesn't matter if it is the first time or 2nd time). On stage 26A, let Vann take out Carossa. On stage 27, something about Van's kill counts. On stage 32 part 1, take out Woo and Fasalina first, then take out Michael. Joins after stage 32 part 1.
Save the Fafner Units	In stage 15B part 2, let Shouko take out the Festum with 30% or more HP before she self destructs. In stage 17 A, let Kouyou have more than 1 kill. On stage 30 Fafner route, something about the levels and kills count. Not sure if it is the average between the pilots or individually. After stage 31 Fafner route, they all live.