In my late 1990’s I’ve been
introduce to Play Station, many epic games ancestor, FF series, Resident
Evil/Biohazard, MGS, Digimon, Silent Hill, KOF, Street Fighter, etc, Parasite
Eve is one of the best PS game heritage. OK, Main purpose, here I’ll list out the
Feats you can archive in Parasite Eve: The 3rd Birthday. By archive
these feats in each mission, you will unlock lots of goodies such as new
upgrade parts for weapons, also unlock cheat codes you may use in game. Each
mission will have few chapters, and there are few feats you can archive in each
of it, you can check the requirement of each feats by checking it in the
“FEATS” tab in status menu, by press ‘start’ in middle of the mission.
Different feat need different strategy to archive, such as kill all the enemies,
run from an enemies unharmed, defeat certain enemies, move soldiers in certain
pattern or ways using overdive, etc. 
Extra info I patch from wiki : The
infamous shower FMV can be viewed between episodes in either the locker room at
CTI HQ or the shower room in Maeda's hideout; the requirement to view it is
that Aya must accomplish a particular feat in the
preceding episode. The feat required is different on each difficulty level, but
if Aya fails the required feat, examining the shower will give an indication of
which feat was needed, such as "I can't let those Snatchers take me!" for the first feat of chapter 3-2. Unsurprisingly, the shower scene is
not viewable between Episodes 0 and 1, due to episode 0 having no feats; also,
between Episodes 5 and 6, there is no opportunity to view it, so Episode 5 feats
are not relevant to the scene.  
There are five different
"ranks" of feat, defined by the BP reward. These will be referred to
as ranks one to five in this article (as an alphabetical scale would risk
confusion with the game's Episode ranks); the BP rewards are as follows: 
 
  | 
 | 
Easy
  andNormal
 | 
Hard(150%)
 | 
Deadly(225%)
 | 
Insane(337.5%?)
 | 
  | 
Rank
  1  | 
1,200
   | 
1,800
   | 
2,700
   | 
04,050?  | 
  | 
Rank
  2  | 
1,600
   | 
2,400
   | 
3,600
   | 
05,400?  | 
  | 
Rank
  3  | 
2,000
   | 
3,000
   | 
4,500
   | 
06,750?  | 
  | 
Rank
  4  | 
3,000
   | 
4,500
   | 
6,750
   | 
10,125?
   | 
  | 
Rank
  5  | 
4,000
   | 
6,000
   | 
9,000
   | 
13,500?
   | 
----------------------------------------------------------------------------------------
 Episode
1 (Operation Rainbow Dust) 
- By achieving at least four feats in this Episode on
     Hard mode, the "No Armor" cheat code will be unlocked. 
- By achieving at least four feats in this Episode on
     Deadly mode, the "Static LIFE" cheat code will be unlocked. 
Chapter
1-1 
Rendezvous with team unharmed 
- Aya must reach the safe room without having taken any
     damage whatsoever (even if she recovers the HP). 
- Feat received after entering the safe room. 
- Rank 3 feat. 
Destroy all Wads 
- Aya must destroy every Wad in the chapter. Two Wads in the last
     zone before the safe room only appear when Aya approaches the metal mesh
     fences; one fence is at the start of the zone, and the other is behind the
     orb. 
- Feat received after defeating the last Wad. 
- Rank 2 feat. 
Destroy all Slackers 
- Aya must destroy every Slacker in the chapter. 
- Feat received after defeating the last Slacker. 
- Rank 1 feat. 
Chapter
1-2 
Bring civilians to safety 
- Aya must take at least five civilians to the safe room
     by Overdiving into them and returning there. The civilian in the room
     before the safe room (the one with the first securable platform) counts
     towards the quota. There are a total of six civilians that can be saved in
     the chapter. 
- Feat received after rescuing the fifth civilian. 
- Rank 2 feat. 
Secure platform 
- In either of the two rooms with soldiers on a raised
     platform, Aya must kill all of the Twisted before they destroy the
     platform. 
- Feat received after leaving the room with the secured
     platform. 
- Rank 1 feat. 
Chapter
1-3 
Escape from Reapers unharmed 
- Aya must traverse the two zones with Reapers without taking any damage.
     Furthermore, when the Reapers are in their seraching orb form, them
     touching Aya and materialising counts as being harmed by them; this is
     particularly irritating with the second Reaper, which has a tendency to
     pop up right next to Aya when it's least expected, making it harder to
     avoid. For the first Reaper, avoiding harm is most easily done by taking
     the right-hand path when the corridor splits; however, this will deprive
     the player of the next feat (see below). 
- Feat received after reaching the safe room after the
     second Reaper. 
- Rank 2 feat. 
Swift retreat from first Reaper 
- Aya must take the left-hand path when the corridor
     splits while fleeing the first Reaper. If she becomes be trapped between
     the blood walls, the above feat is rendered impossible, as she will be
     unable to escape until the Reaper touches her; it is, however, possible to
     "outrun" the walls with well-executed dodge rolls (in
     particular, repeating two rolls followed by a normal step to avoid the
     third roll's cooldown), although this may take practice. It is generally
     easier to enter Liberation just before turning the corner into the
     left-hand path, then flash-step past the walls. The player should,
     however, be ready to act fast when Liberation ends, lest the Reaper catch
     up while Aya is recovering. 
- Feat received when Aya drops to the lower floor level
     at the end of the left-hand path. 
- Rank 2 feat. 
Rescue civilian from Reaper 
- When fleeing the second Reaper, Aya must Overdive into
     the civilian and take them to the subsequent safe room. 
- Feat received after reaching the safe room with the
     civilian. 
- Rank 2 feat. 
----------------------------------------------------------------------------------------
Episode
2 (Operation Black Storm) 
- By achieving at least four feats in this Episode on
     Hard mode, the "No Evasion Assist" cheat code will be unlocked. 
- By achieving at least four feats in this Episode on
     Deadly mode, the "Limited Weapons" cheat code will be unlocked. 
Chapter
2-1 
Use Overdive Kill frequently 
- Aya must use Overdive Kill on at least eight enemies
     duing the chapter. 
- Feat received after meeting the quota. 
- Rank 1 feat. 
Swiftly ward off Roller 
- Aya must destroy the Roller in the alleyway very soon after it spawns.
     
- Feat received after defeating the Roller. 
- Rank 1 feat. 
Swiftly ward off Rover 
- Aya must kill the Rover before Gabrielle
     arrives. 
- Feat received after defeating the Rover. 
- Rank 5 feat. 
Chapter
2-2 
Preserve Overdive ability 
- Aya must Overdive into other people as few times as
     possible during the chapter. 
- Feat received after defeating the Queen. 
- Rank 2 feat. 
Use satellite cannon 
- Aya must kill at least ten enemies using the satellite
     cannon. Note that enemies by the final trio of orbs will respawn
     indefinitely while the orbs remain, so one can take the time to meet the
     quota there before entering the Babel. 
- Feat received after meeting the quota. 
- Rank 1 feat. 
Swift return from inside Babel 
- Aya must kill the Queen before it enters the vortex
     phase of the battle. 
- Feat received after defeating the Queen. 
- Rank 4 feat. 
Chapter
2-3 
Clear out all poison fog 
- Aya must destroy all of the fog-emitting Stinkers in the chapter. Note that after
     leaving the street with a high concentration of Stinkers, Aya should
     return immediately to spawn a new set which must also be killed. 
- Feat received after clearing the Beans and Stinkers on the roof. 
- Required for the shower FMV on Easy mode. 
- Rank 1 feat. 
Swiftly breach the orb nest 
- Aya should focus on destroying the orbs before quickly
     mopping up the surrounding enemies. 
- Feat received when all enemies in the orb nest are
     defeated. 
- Rank 1 feat. 
----------------------------------------------------------------------------------------
  
Episode
3 (Operation Red Fog) 
- By achieving at least three feats in this Episode on
     Hard mode, the "No Regen" cheat code will be unlocked. 
- By achieving at least three feats in
     this Episode on Deadly mode, the "Level Hold" cheat
     code will be unlocked. 
Chapter
3-1 
Avoid Rover battle 
- Aya must evade all of the Detectors in the chapter, thus avoiding them
     calling the Rovers into the physical plane. This can become particularly
     tricky after going down the stairs to the rail platform, especially if the
     player is also attempting the chapter's third feat (see below). 
- Required for the shower FMV on Normal mode. 
- Rank 1 feat. 
Destroy all Snatchers 
- Aya must kill every Snatcher in the chapter. This is
     quite easy, as killing the first group is preferable to trying to outrun
     them, and killing the second group is compulsory. 
- Feat received after killing the last Snatcher. 
- Rank 2 feat. 
Recover all supplies 
- Aya must collect every ammo recharge and box of
     grenades in the chapter. The one on the railway platform can be a nuisance
     to players attempting to avoid Detectors for the chapter's first feat (see
     above). The first box is easily missed; it is in the alcove behind Aya as
     she approaches the exit of the first zone. 
- Feat received after collecting the last box of
     supplies. 
- Required for the shower FMV on Easy mode. 
- Rank 1 feat. 
Chapter
3-2 
No soldiers taken by Snatchers 
- Aya must prevent any soldiers from being dragged into
     the Snatchers' spiderweb wormholes. If a soldier is grabbed by a Snatcher,
     Aya must shoot it to make it drop them. 
- Feat received after clearing the Snatcher-filled room
     after the train crashes. 
- Required for the shower FMV on Hard mode. 
- Rank 4 feat. 
Destroy all orbs 
- Aya must destroy every orb in the chapter. 
- Feat received after destroying the last orb. 
- Rank 1 feat. 
Evade infrared traps 
- Aya must not make contact with the infrared traps in
     the chapter. 
- Feat received after leaving the zone filled with
     infrared traps. 
- Rank 1 feat. 
----------------------------------------------------------------------------------------
  
Episode
4 (Operation Blue Hail) 
- By achieving at least three feats in
     this Episode on Hard mode, the "No Info" cheat code
     will be unlocked. 
- By achieving at least three feats in
     this Episode on Deadly mode, the "Critical Illness"
     cheat code will be unlocked. 
Chapter
4-1 
Secure barricade 
- Aya must not allow any of the orange barricades in the
     chapter to be destroyed. 
- Feat received when entering the lift. 
- Required in order to see the shower FMV
     between Episodes 3 and 4 on Hard mode. 
- Rank 2 feat. 
Tank team survivors unharmed 
- At the start of the chapter, Aya must defeat the Worm without the three tanks sustaining any
     damage. This is best done by quickly eliminating the runt spawn with
     well-placed missiles, then focusing on the giant Worm. All fireballs
     should be shot out of the air with gunfire, and even more importantly, the
     greenish watery orbs should be shot to prevent the spawning of fresh
     runts. This tactic is also important for the next feat (see below). 
- Feat received when the giant Worm is killed. 
- Required for the shower FMV on Deadly mode. 
- Rank 4 feat. 
Swiftly breach tower 
- Aya must destroy the giant Worm as quickly as possible.
     In particular, the player should endeavour to prevent the spawning of fresh
     runts by using the tanks' machine guns to shoot the watery orbs spat out
     by the Worm. This tactic is also helpful for the previous feat (see
     above). This feat can be a matter of practice and luck more than most
     other feats, as aiming missiles at the Worm's mouth is not exactly easy
     due to its tendency to suddenly move its head. 
- Feat received when the giant Worm is killed. 
- Required for the shower FMV on Hard mode. 
- Rank 4 feat. 
Chapter
4-2 
Reinforcements survived 
- After the helicopter segment, Aya must kill the two
     runt spawn on the top floor without the soldiers dying. If a soldier is
     sucked into the maw of one of the spawn, the only reliable way to save
     them is to Overdive into them and then enter Liberation. 
- Feat received when entering the safe room after killing
     the two runt spawn. 
- Rank 3 feat. 
Secure air supremacy 
- Aya must destroy at least twenty Spitters on the building exterior. 
- Feat received after killing the twentieth Spitter. 
- Required for the shower FMV on Normal mode. 
- Rank 2 feat. 
Assist with retreat 
- Aya must kill the first runt spawn seen in the
     helicoptor segment of the chapter. Note that the opportunity to do so is
     fairly short. 
- Feat received after killing the runt spawn. 
- Required for the shower FMV on Easy mode. 
- Rank 1 feat. 
 ----------------------------------------------------------------------------------------
 
Episode
5 (Operation Scarlet Snow) 
- By achieving at least five feats in
     this Episode on Hard mode, the "Critical Disease"
     cheat code will be unlocked. 
- By achieving at least five feats in
     this Episode on Deadly mode, the "Half Ammo" cheat
     code will be unlocked. 
Chapter
5-1 
Conserve ammo 
- In the zone where there are several barricades and
     orbs, with Beans, Wads and Rollers, Aya should quickly destroy the orbs
     before turning her attention to the Twisted. This "conserves
     ammo" by preventing the arrival of additional Twisted. 
- Feat received after leaving the zone. 
- Rank 2 feat. 
Sustain reinforcements 
- Aya must not allow any of the soldiers in the chapter
     to die. 
- Feat received after reaching the safe room at the end
     of the chapter. 
- Rank 3 feat. 
Destroy all orbs 
- Aya must destroy all of the orbs in the chapter. This
     should follow by default if the chapter's first feat is accomplished (see
     above). 
- Feat received after reaching the safe room at the end
     of the chapter. 
- Rank 1 feat. 
Chapter
5-2 
No allies turned into Twisted 
- Aya must kill the Mudflaps before they can turn any soldiers
     into Slackers, and must do so with an Overdive Kill so that they cannot
     possess a soldier to regenerate. 
- Feat received when leaving the zone after killing the
     second Mudflap. 
- Rank 3 feat. 
Act fast in first Mudflap battle 
- Aya should immediately destroy the three orbs near the
     first Mudflap, before any Twisted can spawn from them. 
- Feat received when leaving the zone after defeating the
     first Mudflap. 
- Rank 1 feat. 
No backup on second Mudflap 
- Aya must not allow any additional soldiers to arrive
     when fighting the second Mudflap. The most reliable way to do this is to
     simply avoid destroying any of the orbs in the zone, although this does
     mean forfeiting the supplies behind them. Since the soldiers will shoot at
     the orbs once the Snatchers are defeated, the player should Overdive into
     each soldier and move them to the entrance, where they cannot target the
     orbs. 
- Feat received after leaving the zone. 
- Rank 3 feat. 
Chapter
5-3 
Sustain reinforcements 
- Aya must not allow any of the soldiers in the chapter
     to die. 
- Feat received after reaching the safe room at the end
     of the chapter. 
- Rank 4 feat. 
Destroy all Beans 
- Aya must kill at least five Beans during the chapter.
     Beans will spawn indefinitely in the corridor with the blue walls, as long
     as those walls remain raised. 
- Feat received when the fifth Bean is killed. 
- Rank 3 feat. 
Destroy all Rollers 
- Aya must kill at least fifteen Rollers during the
     chapter. Rollers will spawn indefinitely in the two-tiered chamber as long
     as the upper orbs are intact. 
- Feat received when the fifteenth Roller is killed. 
- Rank 2 feat. 
Chapter
5-4 
Reinforcements survived 
- Aya must not allow any soldiers to die in the battle
     against the Reaper. 
- Feat received when leaving the zone after defeating the
     Reaper. 
- Rank 3 feat. 
Additional
feat-related unlockables 
- By achieving at least 75% of all feats on Hard mode,
     the "No Over Energy" cheat code will be unlocked. 
- By achieving at least 75% of all feats on Deadly mode,
     the "NPC One-hit Death" cheat code will be unlocked. 
- By achieving at least 50% of all feats on Hard mode and
     higher, the Lightning Custom outfit will be unlocked. 
- By achieving at least 75% of all feats on Hard mode and
     higher, the "No Cover" cheat code will be unlocked.