First of all, I'm aware that there is already a guide about all planes types here:
http://steamproxy.com/sharedfiles/filedetails/?id=242053657
But I feel that it's not good enough, that's why I make this guide.
My guide will include all combination types as a "to-do list" so you can easily check/mark which combination you have done.

To get "SEEN IT ALL" achievement you need to pilot all 125 Rauser combinations.
To do this you just need to make a various combination of your weapons, body, and engine.

You just need to launch your plane and then let it die. The best way to do this is going on SFMT mode, you die a lot easier in this mode (save time).

How to use my to-do list/Legacy:
(weapon, body, engine) so (1,1,1) = weapon 1, body 1, engine 1
I'm using numerical order to make it simplier rather than the name ex: original, original, original.

List of Possible Combination:
Combo #001. (1,1,1) = Original
Combo #002. (1,1,2) = Jetrauser
Combo #003. (1,1,3) = Mosquito
Combo #004. (1,1,4) = Penguin
Combo #005. (1,1,5) = Floatrauser
Combo #006. (1,2,1) = Heavy
Combo #007. (1,2,2) = G.N.
Combo #008. (1,2,3) = The Slug
Combo #009. (1,2,4) = Kiloman San
Combo #010. (1,2,5) = Nimbus
Combo #011. (1,3,1) = Stalker
Combo #012. (1,3,2) = Ramjet
Combo #013. (1,3,3) = Tandem
Combo #014. (1,3,4) = Jaws
Combo #015. (1,3,5) = Bonerauser
Combo #016. (1,4,1) = Dumbo
Combo #017. (1,4,2) = Kamikaze
Combo #018. (1,4,3) = Food Poisoning
Combo #019. (1,4,4) = Seabomb
Combo #020. (1,4,5) = Major Tom
Combo #021. (1,5,1) = Luftbomber
Combo #022. (1,5,2) = The Situation
Combo #023. (1,5,3) = Gunship
Combo #024. (1,5,4) = Garfield
Combo #025. (1,5,5) = Floatbomber
Combo #026. (2,1,1) = Beamrauser
Combo #027. (2,1,2) = Laser Knight
Combo #028. (2,1,3) = Pilot Party
Combo #029. (2,1,4) = Nautilus
Combo #030. (2,1,5) = Spacerauser
Combo #031. (2,2,1) = Teddy
Combo #032. (2,2,2) = Tuberauser
Combo #033. (2,2,3) = Ground Control
Combo #034. (2,2,4) = Humpback
Combo #035. (2,2,5) = Billy 40
Combo #036. (2,3,1) = Jouster
Combo #037. (2,3,2) = Contact Beam
Combo #038. (2,3,3) = Teethrauser
Combo #039. (2,3,4) = Nightmare
Combo #040. (2,3,5) = Drill Killer
Combo #041. (2,4,1) = Inspector
Combo #042. (2,4,2) = Batman
Combo #043. (2,4,3) = Resuartful
Combo #044. (2,4,4) = Swordfish
Combo #045. (2,4,5) = Biohazard MK.I
Combo #046. (2,5,1) = The Pidgeon
Combo #047. (2,5,2) = Stormrauser
Combo #048. (2,5,3) = Torpedorauser
Combo #049. (2,5,4) = Holy Diver
Combo #050. (2,5,5) = Orbital Rauser
Combo #051. (3,1,1) = Spreadrauser
Combo #052. (3,1,2) = Gardner
Combo #053. (3,1,3) = Marauder
Combo #054. (3,1,4) = Space Time
Combo #055. (3,1,5) = Moonrauser
Combo #056. (3,2,1) = Koziler
Combo #057. (3,2,2) = The Pig
Combo #058. (3,2,3) = Greedhead
Combo #059. (3,2,4) = The Jelly
Combo #060. (3,2,5) = Fork
Combo #061. (3,3,1) = The Dog
Combo #062. (3,3,2) = Karaterauser
Combo #063. (3,3,3) = Bladerauser
Combo #064. (3,3,4) = Shipwreck
Combo #065. (3,3,5) = Grasshopper
Combo #066. (3,4,1) = Boom
Combo #067. (3,4,2) = Lockon
Combo #068. (3,4,3) = The Vulture
Combo #069. (3,4,4) = Jacques
Combo #070. (3,4,5) = Hawkrauser
Combo #071. (3,5,1) = The Eagle
Combo #072. (3,5,2) = Air Pilot
Combo #073. (3,5,3) = Bob Raus
Combo #074. (3,5,4) = A-Rauser
Combo #075. (3,5,5) = Houserauser
Combo #076. (4,1,1) = Maverick
Combo #077. (4,1,2) = Hunter
Combo #078. (4,1,3) = Hummingbird
Combo #079. (4,1,4) = Breakfast
Combo #080. (4,1,5) = Alucard
Combo #081. (4,2,1) = Skullrauser
Combo #082. (4,2,2) = Grizzly Hugs
Combo #083. (4,2,3) = Spook
Combo #084. (4,2,4) = Piranha
Combo #085. (4,2,5) = Postman
Combo #086. (4,3,1) = Luftpirate
Combo #087. (4,3,2) = Hellrauser
Combo #088. (4,3,3) = Relicrauser
Combo #089. (4,3,4) = Hammerhead
Combo #090. (4,3,5) = Switchblade
Combo #091. (4,4,1) = Vengeance
Combo #092. (4,4,2) = Danger Zone
Combo #093. (4,4,3) = Devestator
Combo #094. (4,4,4) = Samurauser
Combo #095. (4,4,5) = Loveless
Combo #096. (4,5,1) = Passenger
Combo #097. (4,5,2) = Trailblazer
Combo #098. (4,5,3) = Assaultbird
Combo #099. (4,5,4) = Trickster
Combo #100. (4,5,5) = Unhealthy Boeing
Combo #101. (5,1,1) = Hubble
Combo #102. (5,1,2) = Mechrauser
Combo #103. (5,1,3) = Corpsemaker
Combo #104. (5,1,4) = Terror From The Deep
Combo #105. (5,1,5) = Enforcer
Combo #106. (5,2,1) = Tentonner
Combo #107. (5,2,2) = Smalls
Combo #108. (5,2,3) = Scientist
Combo #109. (5,2,4) = Warturtle
Combo #110. (5,2,5) = Brutal Rauser
Combo #111. (5,3,1) = Bull
Combo #112. (5,3,2) = Staff Pick
Combo #113. (5,3,3) = Infiltrator
Combo #114. (5,3,4) = Sinker
Combo #115. (5,3,5) = Hellrauser
Combo #116. (5,4,1) = Pinochio
Combo #117. (5,4,2) = The Fury
Combo #118. (5,4,3) = UVB-76
Combo #119. (5,4,4) = Gunfish
Combo #120. (5,4,5) = Biohazard MK.II
Combo #121. (5,5,1) = Drop It
Combo #122. (5,5,2) = Strikerauser
Combo #123. (5,5,3) = Widowmaker
Combo #124. (5,5,4) = Moose
Combo #125. (5,5,5) = Fist of God
Combo #126. (6,6,6) = ??? (Urauser)

Protip: Just copy-paste above list to notepad and start doing the combos, give it a mark when you have done a combo.
N.B.: Notice that Hellrauser appear twice in (4,3,2) and (5,3,5)

When you have done all the combos above the achievement will pop up immediately.
And congratulations you have done it, you have 100% LUFTRAUSERS