Cliffnotes for a walkthrough:
Mission 1
Grab 2 Plates from left and right path branches, insert them to circuit box next to the locked door, pass through.
Sewer key is on a pallet next to the wall to the right when entering.
Unlock door, climb, approach room exit to trigger 3 minute arena.
You can totally mow down all of the Zombies if you can score headshots - they drop ammo after all. Just be careful, combat loot disappears after a short while. Otherwise, just move in a circle around the room, vault the obstacles, they can't really keep up with you.
Climb up into open area. Press M to enable a target beacon for the mansion.
Mansion gate is locked, Zombies right next to the brick walls drop it. (Left corner when looking at gate towards mansion)
Mansion front door is blocked by cabinet, go to the side and push to clear. Key for front door is on a shelf all the way to the left on the balcony.
Now inside mansion. Meet first fat guy. If you are clothed, he will do an unavoidable(?) charge attack that strips you. Just stay stripped and they won't do the charge attack. Don't get grabbed, i dont think you can break free and its instadeath. Sprinting past at a minimal distance seems safe enough. I dont think they can die.
The goal is to collect 4 plates and put them into the machine on the wall to the right. There is several doors and paths, but since they are locked by subsequent keys (heart, club, spade, diamond) it's fairly linear.
When entering the Main Hall, take the door to the right. There is one open door, a filing room of sorts, find the Spade Key inside.
Back to Main Hall, now the door straight: Leads to heart door and a stairwell to second level. Heart key is on a cabinet on second level. Plate and key in heart room.
The second level door takes the Spade key. Find next key past there.
Exit back to main hall. Use first door again. At the end of a long hall the door for the key you found in heart room. Stairwell to level two, follow it to get to main hall second floor. You have to push some cabinets to get at stuff under them. Hall half-hidden behind shelf opposite to your entrance point. Plate in cabinet, next key near the end of the halfhidden hall. Beware fat guy.
Last key - diamond - opens door from main hall, left side. Final plate through there. Put all plates in machine and touch the green crystal (beacon) to "end the mission".
Mission 2
Go to mansion. Front gate is unlocked, front door key is on the inside of the front gate.
Basically re-do a mansion run except the plates and keys have shifted positions. Notes: One plate is now half-hiding behind a shelf on the main hall second floor. Heart key is in the open near the heart door. Diamond door is optional, there is no plate inside.
Once all plates are placed, exit the mansion and go back to the sewer grate. Enter.
As you backtrack, kill all enemies because they drop a plate for the breaker box and the sewer key.
The second plate is stuck to the ceiling near the green goal, shoot it to get it. The third plate is in the room with the dogs, "islands and bridges", on a barrel. In mission 1 there was ammo in that spot. The final plate is at the Mission 1 spawning point.
The breaker box is on the wall in the room with the dogs and "islands with bridges", basically the first big room from Mission 1. Return to goal in the arena room and touch it to finish this version.
Mission 3
Goal is to kill all enemies, then touch the beacon. Right at the spawn there is a Zombie on a roof you cannot get to. Shoot it from the street.
Otherwise just sweep and kill. Some enemies stand in dark corners. Several are inside containers or out of level bounds.
There is a ladder to a roof area later in the level. On the roof area, there is a kind of mesh blocking the path, Zombie dog on roof behind it.
There is a Zombie all the way in a dark corner on that roof impossible to see, FYI.
Mission 4
Disclaimer: This level is super tedious and you dont want to play it.
Seriously, it takes like 45 minutes if you dont waste time.
You have to free 3 crystal light beams onto the crytal over the Beacon to finish.
One of the light crystals it at the bottom of an elevator and needs to get driven topside first.
The elevator requires 3 fuses to operate. 2 of them are fairly close the the Beacon, one is not.
There is no loops in the level, its all dead-ends and a couple branches, so do what any rational explorer would do and just hug a wall.
Hug the left, because if you hug the right you will have to re-do parts of the level.
You should find the first fuse on a crate before encountering the cave with the sewing machine and the Beacon.
Continue hugging the left and just run down the entire cave. Dont die, you will have to do-over everything except collecting fuses.
The second fuse you should encounter is far away from the Beacon, next to a shaft collapse.
You will run into crystals and their beams. Where the beams seem to stop midair, theres invisible shit blocking them.
Just shoot to make them visible, shoot some more until the beam passes.
Repeat until the beam reaches the Beacon, but dont deviate from hugging the left wall or you might get lost.
You should have freed 2 beams and have 2 fuses by the time you move towards the elevator area.
The third fuse is randomly on a crate not too far from the Beacon, where the crystals for the third beam are present.
Run it down hugging left all the way. You will see the top of the elevator first and what feels like hours later arrive at the bottom of it.
At the bottom of the elevator there is a crystal beam too, but it ends with an overturned crystal, dont bother with it.
Use the fuses and let the elevator ascend. Run back to where the third fuse was (hug the right now if you dont want to bother thinking)
and unlock the final beam.
More importantly, my savegame for you:
All 4 Missions are beaten/unlocked
Unlocked Hair Types:
A, B, C, D, Classic 3, Classic 5
R3make hair is unobtainable, i beat Mission 3 in under 4 minutes...
Unlocked Outfits:
Classic 1, Classic 3, Secret 1, Secret 2, R3make
Glasses A,B and Scarves A,B are unlocked
