Super Robot Wars/K/Secrets

Unlockable	Condition to Unlock
Heine Westenfluss with GOUF Ignited	On stage 19, have Arthrun attack Heine, and then convince him.
Stella Loussier with Gaia Gundam	On stage 14A part 1, do NOT use Kira to defeat Shinn. Stage 14A part 2, do NOT defeat Shinn at all. Then on stage 15A, do NOT take out 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 use Kira to defeat Shinn. Stage 14A part 2, do NOT defeat Shinn at all. Then on stage 15A, do NOT take out 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.
Sword	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 31 part 1, take out Woo and Fasalina first, then take out Michael. Joins after stage 31 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 31 part 1, take out Woo and Fasalina first, then take out Michael. Joins after stage 31 part 1.