I've been looking at the various Life Support mods. There is no one place to discuss this, each has it's own thread. So far, I've found nine different mods (thanks to those who pointed me to Snacks and Ioncross): Snacks! Kerbal simplified life support Interstellar Flight Inc. Kerbal Life Support Mod ECLSS (not supported in 0.90) TAC Life support Ioncross Crew Support v1.18 (Starwaster's branch) USI Life Support Kerbalism (new mod) Close