Lost In Blue 2 Codes -

Serious Survival mode:
Successfully complete the game in Survival mode. In this mode you must survive as long as possible without a partner. 

Another house location:
Go far in the jungle to find a grassy place. You can make another house there.

Help from your partner:
You can ask your partner for food and firewood. When you have 40% or less, tell her or him to get food or firewood. 

Getting items:
Repeatedly press A outside and you will get spices every time. If you want to get salt or shells you must go to the beach.