Player ghots
When humans die, they should become transparent and intangible ghosts that have infinite stamina and can pass through walls. Ghosts must return to telenodes where they can get a new body. However, an alien can dissipate a ghost by passing through it, that's second death, and if player dies as a ghost, loses all credits. Makes perfect sense, as credits a way to know if a clone is worth having better weapons, why give credits of one clone to another clone with a different mind?