Walkthrough

Turning alien
Turn into an alien to prevent yourself from being captured, you can do this by using the Surgery.

In the kitchen on top of the oven is a Canal Parasite (why it's there who knows?)

Infest the soldier and the cook then gain access the bridge and Infest the captain with a choker parasite and then once it has fully merged with her insert a werm parasite in her brain.

Once the captain is brain-infested, "Warp Speed Ahead" to the space station, upon entering the space station move up a few tiles and enter Medical Bay to fill yourself with Choker Eggs (Be warned; When this action is repeated you get the "Egg Breeder" bad end), these eggs will hatch into Chokers after about 10 tiles of movement.

In the Space Station Lab you will be attacked by the Antari Scientist and acquire Starfish.

In the Surgery, merge werms together to create more of the other parasites.

Staying human
Avoid all the rooms with the aliens in them and fix the Escape Pod.

Go to the escape pod and try to launch it, only to fine it needs parts.

grab the helmet and get attacked by the choker, when you wake up make a run for the surgery.

Once in the surgery, choose the option to remove all parasites, this will remove the un-merged choker and the werm that was inside you.

now that you are cured of parasites go collect the escape pods missing parts and get the heck outta here.

Infested exit
Infest the secretary and grab the key.

Enter the locked room and Examine the bio-hazard crate

Result
 * Lose all parasites and infestations
 * Revert to starting gender

Escape Pod exit
Fix the escape pod, either follow or ignore the above instructions as more parasites you gain here the faster you can progress in Part 2.

Result
 * keeps all infestations
 * Keep stored parasites
 * body/gender changes carried over

Day 1: Monday

 * Place the Werm in your mouth and go to school
 * Talk to the weird girl and choose "Yeah", she'll snog you and this will get her infected
 * During the end of school go to Steve's house and infect his room.
 * At home (random chance) that rooms can be infected.

Day 2: Tuesday

 * By now you should have gotten another Werm.
 * (female only) Place it in your Vagina.
 * (male only) Hold onto it.
 * Check rooms (random chance) that rooms can be infected.
 *  Do not  infect more than 1 room in the house in the morning as it'll use up all your time at school.
 * Go to school and talk to Tracie again and infect her further.
 * Female; you fuck her vagina with your werm cock.
 * Male; you eat her pussy out and fuck her with your throat werm.
 * End of school (random chance) to infect the teachers lounge.
 * Once home (random chance) that rooms can be infected.

Day 3: Wednesday

 * Another day another Werm, place this one in your Ass.
 * If you haven't already done so Infect Julie or Sandra's room, (female only) or Jessica's.
 * Go to school, infect Tracie more.
 * (random chance) to infect the teachers lounge.
 * Once home (random chance) that rooms can be infected.

Day 4: Thursday

 * (male only) morning time; another chance to infect Jessica's room.
 * Go to school, talk to Tracie, this time you don't infect her any further but instead just asks for a quick fuck.
 * (random chance) to infect the teachers lounge.
 * Once home (random chance) that rooms can be infected.

Day 5: Friday

 * (random chance) that rooms can be infected. if you haven't already.
 * Go to school and talk to Tracie, now you get the option to visit The Sanctum, here you can fully interact with her and merge werms into bigger parasites.
 * (random chance) to infect the teachers lounge. if not already.
 * Once home (random chance) that rooms can be infected.

Day 6: Saturday

 * Go infect the shopping Mall, start with Flounder Express as it'll infect other stores over time, and one other store of your choice.
 * Once home (random chance) that rooms can be infected.

Day 7: Sunday

 * Do whatever you want today.
 * though if you want to infect the mall more, don't infect any rooms at home before hand.
 * Once home (random chance) that rooms can be infected.

Day 8: Monday (again)

 * Go to school, go straight to class, today the teachers lounge should be empty so you can infect it. (if you haven't already).

Any day after day 10:

 * Once you have inserted a Werm into the brain of a family member, Joan will appear in your room attempting to capture you and bring you back to the spaceship once again, but is stopped by the infested family member.
 * After capturing Joan, visit the Home Storage room on the upper floor and infest him with a choker parasite.
 * Interrogate Joan to unlock the Spaceships location.

Fixing the Spaceship

 * Infest the Tronics store and Furniture store in the mall (need to be predominantly female)
 * Infect at least 1000 people in the town. (The quickest way is to infect the Flounder restaurant at the mall.)
 * Get $50,000 (special session at Jessica's job and Strip Club)
 * Go to the mall parking structure, encounter Rene for the missing part.
 * Go to the spaceship and fix it.

Biosuits

 * Infest Julie with any parasite to unlock the Laboratory.
 * Go to work with Julie at the Laboratory and Interact with Gabrielle.
 * If she hasn't already been infected by Julie first then you'll have to infect the coffee machine in the break room in order to infect her.
 * If she has already been infected then after a quick sex session to infest her with werm spawn you can then unlock the Clean Room.
 * Have a working womb by being either Female or A male with a fully merged Crotch choker..
 * Get 10 of any one type of parasite.
 * Go to the Clean Room at the laboratory, merge parasites into a biosuit larvae and incubate it (for around 10 days).
 * You can Transfer it into others for them to continue growing it so you can repeat and get more.
 * Birth biosuits and put them on yourself and others before exiting part 2.

Part 3 - Assault

 * Have biosuits on yourself and others while starting the level. This entire part is completely text based with only a few choices.
 * Choose any options available, the number of people wearing Biosuits and the type you are wearing may alter your available options.
 * Become Werm and search for a new host body (or your old one)

Part 4 - Antari Core World

 * Find a place to stay by turning someone into your slave and taking their home.
 * Infect food court and turn them into slaves once a day per level.
 * Visit the Portal Hub daily for a random event.
 * Use slaves to breed parasites, earn money or go on missions to gather more slaves.
 * Turn slaves into resources to be used to upgrade different areas.
 * In process of development . There is currently no transition to part 5.

Part 5 - Return to Earth

 * Part 5 everything changes. You are now playing primarily as the werm.
 * Chose a starting body to infest
 * Bide your time to pass the time.
 * Release pheromones while in the room with other people
 * When alone in a room have your host body masturbate to alleviate arousal and tension as too much tension results in a game over.
 * If alone you can exit the host and travel in the vents to move to another room and release pheromones there. DO NOT bide time while out of the host body or you will be left behind.
 * Use some of your starting parasites to either infest the host body at night or try to infest another person in the same room while everyone sleeps.
 * After the choker has been placed on the hosts neck (using the above tactic) and has had enough time to mature you can inhabit said choker and control the hosts body.
 * Control the host and visit various people if their arousal is high enough they may want to have sex with you giving you the chance to infect and infest them.
 * If you're lucky enough to have and you next target has been infested while interacting with them you may exit your host and enter the target body's vagina / neck choker (if available)
 * the goal it to access your original body being locked inside the Brig, which is heavily locked. you'll have to find a way to unlock it.
 * If you enter a body that has a fully matured neck choker, then by entering their vagina (or anus if still male without a crotch choker) and induce them to masturbate upon orgasm you may gain a glimpse into their mind unlocking some information you may or may not find useful.
 * Under Development. Everything is subject to change.
 * {Very buggy} You can prepare a different type of parasite in the hosts vagina then later you can mutate to become a different parasite. (you'll fuse with their body.)
 * You can also undergo a color mutation as well (No effect on the game)