Some Cheats to help make surviving a little easier. they will not affect any achievements or the game. for ps3 remember square=S and triangle=T
360
1000 credits-XXXYX
2000 Credits-XXXYY
5000 Credits-XXXYXY
10000 Credits-XYYYXXY
Five Power Nodes-YXYXXYXXYXXY
Two Power Nodes-YXXXY
Refill oxygen-XXYYY
Refill Stasis-XYYXY

PS3
1000 Credits-SSSTS
2000 Credits-SSSTT
5000 Credits-SSSTST
10000 Credits-STTTSST
5 Nodes-TSTSSTSSTSST
2 Nodes-TSSST
Refill Oxygen-SSTTT
Refill Stasis TSTTST