Kino der Toten
To be successful on Kino der Toten I recommend you follow these steps. First off you are going to want to purchase the M14 to use in the first room until about Wave 7/8 or when you all have 3K+ Score. Next you will want to leave a zombie crawling with no legs and run opening the doors needed to get to the theater. Once inside the theater I recommend purchasing the M16/MP40 or both. Now you are going to camp in the theater,
keeping the turrent on until you all have 5,000 score. Now, once your team has 5,000 score you need to leave a crawler alive again and run to the turrent into the teleporter. You will be teleported to a room containing a Pack-A-Punch machine, use this with a gun of your choice and allow your team to do the same. You will then be teleported back to the theater, camp here using your new guns until you are overcame or decide to quit.
Five
I am not the most skilled in Five, but I do know basic strategies to getting to round 30+, This does involve glitching at one point. When you first start off use the pistol in the first room until about 3,000 score, then open the hallway containing the elevator, buy a MPL, and camp inside the elevator killing zombies until about 5,000-6,000 score. Now go down the elevator to the DEFCON room and have each member take a window until you are all about 5,000 score again. Go down stairs and enter the lab, then turn on the power.
LEAVE A CRAWLER ALIVE AT THIS POINT! Return to the DEFCON room and switch all the switches with the label '

EFCON' then go downstairs and enter the teleporter, this will bring you to the Pack-A-Punch, upgrade the gun you want and teleport back to the start, glitch to get on the table in the middle, leave 2 guys off and 2 on and camp here until you decide to quit.
Der Riese
When you spawn on der riese it's in front of you but closed.
1). Stay at spawn point until round 4 than open the door on the right.
2). Open the other door than buy the thompson.
3). Stay there until round 5 than open the 1000 door
4). Turn the power on get what you need in the crate.
5). Open the door behind you stand on the teleporter and link it with the one you spawned at.
6). After connecting look at the map and then look at the Gray lights connect those they will turn green.
7). After all 3 are connected the PaP will be open.
Credits to Northstar-Cody for the Dar Riese Method.
M1911
Changed Name: Mustang and Sally
Notable Effects on Weapon: Smaller Magazine, Dual Wield, Fires Grenades
Notes: Arguably the best weapon to upgrade in terms of the usefulness of the base weapon compared to the usefulness of the upgraded variant. Dual wield capability renders this mobile grenade launcher even more superior to other upgraded Grenade Launchers. Good choice if you just respawned after dying, though it may also be worth it for the player to keep their starting M1911 strictly for upgrading reasons. Useful for taking out crowds, however Splash Damage could hurt or even down the user, making Jugger-Nog recommended.
M14
Changed name: Mnesia
Notable Effects on Weapon: Doubled Magazine, Higher Damage
Notes: Not a good upgrade, even when upgraded it is ineffective against zombies in Later Rounds. However, is still effective up to around round 17. Speed Cola is recommended. Reference to the illness Amnesia.
Olympia
Changed name: Hades
Notable Effects on Weapon: Higher Power, Longer Range, Incendiary Rounds
Notes: Can be comparable to the original Double Barreled shotgun of WaW, facing the same magazine size problems, good if the player prefers a Run and gun style of play, but is a terrible choice for camping, unless the player is a window watcher, where shotguns excel. Speed Cola is recommended when using this weapon. Reference to the Greek God Hades.
Ak-74u
Changed name: AK74fu2
Notable Effects on Weapon: Special Precision Sight, Bigger Magazine, More Damage
Notes: A worthy upgrade; The Precision Sight increases accuracy and the Gun has a Bigger Magazine. In l337, it means AK74 "**** you Too"
MP40
Changed name: The Afterburner
Notable Effects on Weapon: 64 Round Magazine, Slight rate of fire increase, Increased damage.
Notes: Decent upgrade, doubling this magazine size and doubling damage. Rate of fire increased by 10%. However, extra ammo is not increased, making ammunition a worry very early on. It's advised to burst fire, aim for headshots, and not use Double Tap.
Stakeout
Changed name: Raid
Notable Effects on Weapon: Bigger Magazine, Reloads 2 Shells at a time, Longer Range, Higher Damage with grip
Notes: The Upgraded Version decreases reload time and increases damage, making this a good weapon to upgrade. Double Tap is recommended, and so is Speed Cola as the reload time may still be fatal.
MPL
Changed name: MPL-LF
Notable Effects on Weapon: Bigger Magazine, Special Precision Sight
Notes: The Increased Magazine solves the problem of the MPL's small magazine; however, there are easily better weapons to upgrade. Double Tap is not recommended as this will make the gun use up its ammo even faster.
Mp5k
Changed name: MP115 Kollider
Notable Effects on Weapon: Bigger Magazine, More Damage
Notes: Similar to the MPL, there are better weapons to upgrade, however, this is still better than the MPL.
PM63
Changed name: Tokyo & Rose
Notable Effects on Weapon: Dual wield
Notes: The Dual Wield attachment effectively doubles the magazine, and allows the player to fire 1 gun while reloading the other. The iron sights are unusable, however.
M16
Changed name: Skullcrusher
Notable Effects on Weapon: Fully Automatic, Higher Damage, Grenade Launcher
Notes: This Skullcrusher could be considered as Combining an Automatic Assault Rifle Similar to the FAMAS with a China Lake. The Grenade Launcher is useful for taking out crowds or as a backup weapon in the event of the user running out of Ammo.
HK21
Changed name: H115 Oscillator
Notable Effects on Weapon: 125 Round Magazine, 500 carried ammo, Damage Increase
Notes: This LMG is an excellent weapon to upgrade, as the High Damage and Big Magazine of LMGs are often the reason why LMGs are favored by most players. Reference to the element 115. Speed Cola is recommended.
RPK
Changed name: R115 Resonator
Notable Effects on Weapon: 125 Round Magazine, 500 carried ammo, Damage Increase, Dual Magazines attachment
Notes: This gun upgraded is essentially an MG42 without the spare ammunition count of 750. Reload time is improved due to dual magazines, but Speed Cola still recommended, and the already high rate of fire makes Double Tap questionable.
M72 LAW
Changed name: M72 Anarchy
Notable Effects on Weapon: 10 Round "Magazine" (Bigger "Magazine"), Semi-Automatic
Notes: Effective at taking out crowds, however should really only be used as a back-up weapon. Speed Cola is recommended, along with Juggernaut and Double Tap to help with the splash damage and rate of fire, respectively. Possible reference to the fact that "Anarchy" is the opposite of "Law" and Order.
China Lake
Changed name: China Beach
Notable Effects on Weapon: Bigger "Magazine" (5 Rounds), one reload refills the whole magazine
Notes: The China Lake is not the best weapon to upgrade. The M72 LAW / M72 Anarchy is better with a bigger "magazine" and rate of fire. Speed Cola is a must. Name is a pun as Beach is also a water associated term along with Lake, the weapon's original name.
CZ75
Changed name: Calamity
Notable Effects on Weapon: Bigger Magazine, More Damage, Automatic
Notes: This weapon becomes a bit like a Sub-Machine gun after upgrade, but it still has the problem of a small magazine.
CZ72 Dual Wield
Changed name: Calamity & Jane
Notable Effects on Weapon: Bigger Magazine, More Damage, Automatic
Notes: This is probably better than the Normal CZ75 / Calamity in most player's views, by partially solving the small magazine problem.
Python
Changed name: Cobra
Notable Effects on Weapon: Bigger Magazine, More Damage, Speed Reloader
Notes: Exactly the same as the .357 Magnum of World at War, but with it's ammunition capacity and spare ammo doubled in comparison, making it a more suitable option, though it should still be only reserved for backup/last stand weapons.
AUG
Changed name: AUG-50M3
Notable Effects on Weapon: More Damage, Special Precision Sight, Undermounted Shotgun
Notes: Like the M16 / Skullcrusher, the AUG-50M3 combines 2 weapons. This time, it combines a pump-action shotgun with a Assault Rifle with a Special Sight. The Master Key is a viable asset to further promote this weapon, giving more versatility to your load out and at the same time freeing the secondary slot for a third weapon. The Weapon is "AUG-50M3, or AWESOME", according to the name.
FN FAL
Changed name: EPC WN
Notable Effects on Weapon: Special Precision Sight, Bigger Magazine, 3 Round Burst, More Damage
Notes: The EPC WN, or "EPIC WIN" is a okay upgrade, but fully automatic weapons should be upgraded instead. The name itself is a play on words, as "win" without an I is "WN", and "fail" without an I is "FAL".
FAMAS
Changed name: G16-GL35
Notable Effects on Weapon: Special Precision Sight, Bigger Magazine, More Damage
Notes: The Increase in Accuracy and Magazine Size makes this gun a worthy, but average upgrade. The name means "Giggles" in 1337 (Leet).
Commando
Changed name: Predator
Notable Effects on Weapon: Bigger Magazine, Dual Mags, More Damage
Notes: Dual Mags makes using Speed Cola with this weapon of question, Double Tap is a must as to aid this weapon's still agonizingly slow RoF. The name is a possible reference to another movie starring Arnold Schwartzneger.
G11
Changed name: G115 Generator
Notable Effects on Weapon: Bigger Magazine, More Damage, Fully Automatic
Notes: This Weapon's considerably bigger magazine may make it more favorable to upgrade than other Assault Rifles. Reference to the element 115.
Galil
Changed name: Lemantation
Notable Effects on Weapon: Special Precision Sight, More Damage
Notes: The Special Precision Sight makes this a good weapon for Tactical Snipers. However, it may not be as effective against zombies as other guns, because it does not increase it's magazine size when upgraded.
SPAS
Changed name: SPAZ-24
Notable Effects on Weapon: 1 Reload Refills the Whole Magazine, Doubled Magazine Size, Longer Range, Fully Automatic
Notes: The SPAZ-24 is a reference to the magazine size. A very good gun to upgrade, at is has a very fast reload time and very high power.
HS-10
Changed name: Typhoid & Mary
Notable Effects on Weapon: Dual Wield, Bigger Magazine
Notes: If the player does not have the SPAS, he/she may choose the HS-10 to upgrade instead as it has effectively a tripled magazine size.
Dragunov
Changed name: D115 Disassembler
Notable Effects on Weapon: Zoom In/Out Scope, More Damage
Notes: The Semi-Automatic nature of this gun make it better as a support weapon. Reference to element 115.
L96A1
Changed name: L115 Isolater
Notable Effects on Weapon: Zoom In/Out Scope, Bigger Magazine, More Damage
Notes: The Bolt Action nature of this gun makes Double Tap a necessity, Speed Cola also recommended. Reference to element 115.
Ray Gun
Changed name: Porter's X2 Ray Gun
Notable Effects on Weapon: Damage doubled, Spare ammo increased, Magazine capacity doubled.
Notes: A great weapon to upgrade, as a power boost to an already dominant weapon is much coveted by many players, though should only be upgraded after other weapons or when out of ammo, it's damage is doubled, making 1-hit kills without splash damage last for twice as long as the non-upgraded variant, ammo capacity is doubled, making automatic fire less of an issue. Speed Cola is a must, though Double Tap should be avoided as the player will run out of ammo faster.
Ballistic Knife
Changed name: The Krause Refibrillator
Notable Effects on Weapon: Faster Melee Knifing, Glowing Knife
Notes: Useful if your team is down a lot, as shooting a downed ally will heal them. Poor choice for combat, as damage is not notably increased, though melee speed is increased, making it a last-stand only weapon.
Crossbow Explosive Tip
Changed name: Awful Lawton
Notable Effects on Weapon: Zombies Run towards to Fired Bolts, acts like a Monkey Bomb
Notes: This weapon is very useful for distracting zombies. Also, unlike the Monkey bomb, it does not have a long "priming" time, at the cost of around a 3-4 second distraction, giving the player limited time to escape/revive. Speed Cola necessary to provide longer distraction periods.
Thundergun
Changed name: Zeus Cannon
Notable Effects on Weapon: Doubled Magazine, Can Kill More Zombies with One Shot
Notes: Being the closest thing to the Wunderwaffe DG-2, this gun may very well be the best gun to upgrade, though this weapon should be the last weapon to be upgraded, it also lacks the splash damage problem plaguing the upgraded DG-2, making it all the more better, best used with a back up weapon. Speed Cola and Double Tap are recommended.
Winter's Howl
Changed name: Winter's Fury
Notable Effects on Weapon: Bigger Magazine, Longer Freeze Time
Notes: Allows freezing of zombies with one shot and freezes numerous zombies at once. Decent back-up weapon if used with Ray Gun/ Porter's. Speed Cola is recommended.
[multipage=Achievements]
Achievements you can earn via Pack-A-Punched Guns:
Sacrificial Lamb is awarded for killing 6 zombies after getting shot by a Pack-a-Punched crossbow bolt.
See Me, Stab Me, Heal Me is awarded for firing a Pack-a-Punched Ballistic Knife at a downed ally to revive them from a distance.
[multipage=Conclusion]
There you have it, every upgrade available, thanks to the call of duty wikia for the information.
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