Each pair, suggestion + link(s), mirrors one (or more) thread(s) in the section.

All irrelevant proposals were removed (about things that are already in game)

If there is something missing, please PM me with link - i did my best to collect all, and to keep it updated, but something always might slip past me.
Suggestions here are shortened versions of those from threads, i tried to keep the gist of each idea simultanously trying to make it short and explicit.
If someone has a problem with how i shortened their idea then: im sorry, PM me please, and please understand that explaining every detail of your super-duper idea here would
contradict the whole point of the list.

Sorry for lack of actualisation recently - i was quite busy.

Also i'd like to recognize and thank resatt for taking upon himself to help me here

Current status:

    all sugestions are here in shortened form, with links to threads and in no particular order + some of below changes are introduced to some extend

To Do:

    1.) merge duplicated ideas (keeping links to all threads mentioning them)                             - currently working on                                    
    2.) improve on description to better keep on with the gist of them in consistent form          - currently working on (along with #1)
    3.) group the ideas in subjected collections (like weapons / parts / interface etc)                  - todo (after completing #1 and #2)                
    4.) sort ideas in collection so the most mentioned will be on top                                               - todo (after completing #3)

---

Various kinds of multiplayer mode suggestions - mainly about PvP: dascuugen, Xaphedo, adminus, nomenam, laithan, datguy, Arlekin, resatt, bloodstain, vvaid0, irglen, vdragon, felixdemcnell, marcocet, exedre

Ropes as an element (with intuitive rope properties): Praesumo, arne, hpa97, 7lbmonkey, adminus, sushiy, masadeer, sultryavocado

Level / Map editor - for creating custom arenas and challenges: edemim, dascuugen, adminus, MrBetaSkull, nomenam, Spicy

Some way to allow accessible modding of the game: silen, nomenam, datguy

Ability to limit movement of moving parts (for instance hinges bending or steering rotation): XerxesBlue, octopod, resatt, jimwest, irglen

Ability to place parts under certaing angle (tilted): ethan, Praesumo, TBFreaq, arne, resatt, jeveux lrxst

Ability to set moving parts to auto-returning to starting / default position: frankenstein, XerxesBlue, diluvian

Working with elements as a group - rotating, shifting, tilting, loading, editing etc: brrr, dutchy, condoz, hionimi, allmar, bloodstain, yaclive, nixzerion, vdragon, gabessdsp, obliterator2

Copy / Paste for elements and group of elements: Xaphedo, brrr, vdragon, classicsoldier

Smaller (weaker?) explosives: Praesumo, Xaphedo, hpa97, finestep

Symmetrical building (mirrored): snailpropulsionlabs, brrr, derschmied

Better cannons - more power, more range, less recoil, less weight, different ammo, better placement: Praesumo, frankenstein, plasticturd, bloodstain, masadeer, insanityexe

Chains as an element (similarly to rope): arne, Praesumo

Ability to flip "aerodynamic propeller" part to allow building propellers rotating in the other direction: carlz0r, cycokill, XerxesBlue, Praesumo

Ability to write macros / functions / scripts / programs to control machines: nomenam, Arlekin, Amadan, derschmied

Rubber armors (for absorbing shock)
Rubber panels (for making high-friction surfaces
Rubber girders/supports - for making flexible constructions
Smaller propeller assembly
Overlay to exposing stress lvl in constructions
Fix Archers positioning and animations
Parachute explosive sheep as ammo type (more detail in actual post)
Different sizes / types of wheels
Praesumo

- Magic tank // Source of magic. while magic is powerful it should have a limit, thought this would help nerf it a bit - also when hit by arrow, it could break and set fire to the machine
- Force cannon // Medium magic usage. put anything that fits into it and press <key> to shoot with high speed
- Magic cannon // Low magic usage. Hold <key> and it keeps shooting small bullets that "infect" soldiers for a few seconds and then they either turn into a small puddle or create a small explosion
- Magic Mortar // High magic usage. Shoots a huge ball of unstable magic that slowly reach its target(s) in a curved trajectory, and creates a huge explosion with big radius.
The Mortar "ball o' magic" has low effect on building but is highly effective on humans, this "nerf" makes sure that the catapult with bomb stays in the game
- Magic Hose // Low magic usage. When hold <key> down, the hose shoots out a stream of magic that turns humans into a puddle
- Magic generator // Creates magic. Slowly creates magic so if you've been sieging for a long time, fire that mortar once again
 A rotating block that tries to rotate in the direction of the user's mouse instead of using <keys> (direction that tries to face mouse position is indicated with an arrow on the block).
- Reinforced wood That is still vulnerable to burning but is a bit more durable.
- Auto bow with limited arrow supply that shoots where the mouse aims.
- Auto crossbow with limited bolts, shoots further and harder than bow but reloads slower.
- Suspension attached with click and drag like contractable spring. (Also the existing suspension needs animation, but you probably know that )
- Axes, morningstars and maybe hammers.
nixzerion

Sharing machines through steam workshop
Resolution settings in-game
More options in menu (and better described)
More types of standard block (not only wood but also metal and alike)
Bigger build box
mantis

dead cow as an ammunition - causes stink and sickness in living oponents
bomb with fancier blow effects (like fireworks)
bomb in shape of D20 dice which would keep rolling until number 20 comes up - then blow in very powerful way
small transversal blade that attaches on its length, and it's saw-like
spike which would spit fire (except for its ability to ram things)
brass fist as impact damage type weapon
additional material parts (sturdier, heavier and sosuch), also interesting idea to use corpses as a building material
wrapping rope around blocks to act as an armor surface
traversal wheel - for creating monocycles
recently used tab for ease of building using same blocks
rotation of machine should include rotation of building box
free build mode allowing for doing weird things like enlarging/shrinking parts and all kinds of other crazy stuff
Xaphedo

Clip-fed Ballista.
Fire arrow
Armor Piercing arrow
Arrow whose tail pops open into a spinning blade after it lands
Cluster of small stones as ammo type
poison bomb as ammo type
chunk of ice which would freeze enemies on impact
Spinning Blade and/or bomb launcher
Realistic Flamethrower (in sense that would spit fiery liquid instead of blowing a fiery mist)
Pole-arm.
Mortar (differentiating itself from cannon in some ways)
Barrel of Oil
more cannon types
guns
Balls
reloadable cannons
more building materials
Tail fins
Longer wings
more controls for spinning block
limit length of springs
Praesumo

harpoons as weapon / grabbers
mud / swamp / vulcano terrain / level types - to provide additional challange
Wooden Castles Type of buliding easier to destroy than brick castle.
adminus

elements (and environment) for water related machines
bow (for ballista purposes)
catapult parts
more building/units on enemy side
adminus

more material types
decorative parts
glass (as a decorative part)
full metal wheels
hpa97

water gun (for extinguishing fires and sosuch)
oil/tar as a terrain type / surface type (obvious properties - sticky, flammable etc)
Fire-fighting Levels (related to water gun)
water levels
water in levels (as obstacle for instance)
water machines (ships etc)
balan

instant replays
keyboard controlled timescale
timer for reverting resolution changes
XerxesBlue

contractable springs that maintain their length
sliding parts
ability to deploy troops fighting for player
control over units and levelling system for them
a "springy" plank element
pulling mechanism for ropes
some sturdier parts
masadeer

better exiting from edition of block parameters
themed mouse cursor
ability to change keybingings for moving camera
sounds changing according to current timescale
ability to change depth of field
ability to detach camera from object
hionimi

ability to reload cannons
smooth surface (with very low traction) for ballista bearings and such
more options to place things (some elements could be placed off the grid)
Arlekin

ability to trigger an action on key release (separately from on key press)
support for hololens (if they become a thing at all)
hooks
winches
sultryavocado

- Very stiff Blocks (for better bearing seats)
- Very bendy Blocks (for Bows/Ballista/flat spring,….)
- Rigid joints (for medieval gears)
- Connection rods (would spare space and allow more complex engines)
 Smooth Blocks (to enable translational bearings for strimmer’s or Ballista arrows)
- Boats (because i like to have a flying one!)
- Burning Goats as ammo (Barbecue)
- Bigger Wheels (Bigger Wheels - with even more torque - for my medieval buggy)
- Enabling rotation of Joints while in Construction mode (Because Diagonal)
derschmied

- magnets
- Conveyor Belts.
- bigger flying blocks.
- ancient rocket propulsion block
- light weight controls for aircraft
- soft braces works like rubber band
- smooth surface pieces for ballista railing.
- circular spring mechanism like the following pic
ice balls/ snow balls
- launch-able COW! or sheep which can explode
- human cannons ?!?!
- Speargun with ropes attached at the back
- ancient dragon rockets like the one in Disney's Mulan
- van helsing's automatic crossbow
- bigger aerodynamic propeller with aerodynamic spinning blocks
- flying wings which gives a bit of upward force when flying
- strong ramming beable to damage walls
- orc, large and small
- yeti (why not haha)
- Mage
- Shield guy
- enemy siege weapon
- princes, king & queens
- icy level? so flaming balls have some use to it
- flying machine levels, with bigger building boxes, because adding wings costs alot of space
- Boats? would be fun to build our own boats and shoot each other with cannons
chess level
resatt

sensitivity settings for bomb ball
power and dampening settings for the springs
ethan

player figurine (just for fun from watching it in some crazy situations)
fully developed worlds
dascuugen

free rotation with friction for motorized blocks,
ball socketed bracket (hinge alike)
octopod

support for gamepad analogs for keybinds
sandbox map with only visible floor
low graphics option for monster builds
irglen

money system
"rack" type of block (kinda flat cog)
suburansb

ability to "toogle on" (like pistons) for all automatic elements (for instace constant movement for wheels)
ability to create multiple vehicles and toogling steering between them (for simplify multi machine controls)
vdragon

Bigger siege levels QuadICE

Dirigibles, Airships, Balloons, Blimps 7lbmonkey

Triggers for machines, and for mission events. trunks572

Kerbal-like level design, quests and sosuch oldhickory

Following camera twistedbronl

Ability to fire arrows - from crossbows (as single elemnt, like cannon) or something alike senortentacles

Keys for steering camera limlik

Ability to change physics by manipulating constants twistedbronl

Endless game mode where player defends his castle (using his bot and assortment of built in defense mechanisms) against waves of enemy attacks (more details in actual thread) Praesumo

keyboard shortcuts to manipulating speed of time Praesumo

Editable and/or keyboard driven camera control falk

Replay and rewind system danny24sao

Decorative parts like banners and such. snailpropulsionlabs

Unlimited ammo QuadICE

Add specs for game on Linux and Macs systems on game website falk

limiting resources to provide more challange in a campaign levels  snailpropulsionlabs

Better tutorial and on the very first level Praesumo

More visible obvious way to exit a game thebluedragon

triggered explosions hpa97

better v-sync plink

presetting adjustable parts MrBetaSkull

reverse the pitch on the propellers joesnuffie

add achievements Delta3D

localization for other languages MC Lamer

more durable materials bronze

part which would act like a camera for first person experiences crashfu

fixing depth of field skully

more options for attaching springs to holders Lari Fari

I suggest that that spinner itself become the torque source with the verticle faces being the anchor points, and allowing the anchor points to be chosen to allow for more varied creation posibilities. And to also allow for a faster spinning setting, other than just 2x. starnsworth

slider on rail as a part dutchy

multiple explosions boosting eachother finestep

rocket thrusters finestep

harder levels / better victory conditions Arlekin

forum section for ss / fanarts anon

block with better friction 8bitaddiction

ability do break walls with melee weapons (to allow battering rams for instance) korish

money system as motivator / score keeping driftfridge

more sandbox maps damnatus

add collision to brackets Lari Fari

add propulsion to flamethrowers (rocket thrusters ?) pixelpodium

challanges with shared, multiplayer hi-score board zeroharker

more graphic options (borderless window, custom fps cap) giratot

proposition of better UX for changing sliders and keybind on element solano

additional projectiles for shooting duqe

current setup causes motion sickness - changing way camera works (or adding more landscape - broad subject) rylanodory

ice as a terrain type finestep

yet another idea for easing changing settings of blocks damnatus

ranking system ovexator

ability to change properties sliders of elements in-game (outside of building mode) Fox

siege engines (possibly player made) as an enemy haztoks

detach camera from WSAD controls so then they can be used for keybinding snaaky

ability to set up delay and duration for each element action crashfu

ability to adjust torque of spinning block in-game (outside of building mode) dpierres

change colours of starting block to something less anti-climatic zeroharker

customizable spinning suface grantx85

game mode based on surviving waves of enemies with shared high scores noshire

ability to turn sound completly off (not just a music) 1ryzu1

more durable sheeps Fox

folders for organising saved machines Fox

ability to keep game running while in background bloodstain

more enemies animations bloodstain

ability to place additional core blocks bloodstain

gunpowder as an element goran10gp

pigs as an ammunition hrng

merge thumbnail with .bsg file Zeblote

using map elements (sheep, people, trees) to build bloodstain

multiplatform support (3DS) bloodstain

high friction plates/elements bengarrison

larger wheels bloodstain

support for multi-core processors nacon

more (and louder) in-game music bloodstain

improving size and alignment of elements to fit perfectly to a grid octopod

improve physics of springs epicroothaircell

block transferring torque that stays attached to a grid damnatus

ability to fuse block together into one object sirenapples

ability to continuously place / remove blocks bloodstain

"decoration" category for "upowered" parts adminus

ability to self-destruct (don't pass the level, don't collect 200$) bloodstain

improve durability of elements sirenapples

nighttime levels and lightsource blocks statue

touchscreen - tablet version yousofi

different sizes / shapes of building box's as additional challenge zeroharker

make time slider more visible, especially in case of low FPS zodium

static cogs shogun 

ability to place balls (fire, bomb, boulder) on grabbers suburbansb

ability to create and share challenges (as a form of multiplayer) fauxgrim

coloured cloth as a decorative part hpa97

water and ability to make ships hpa97

high friction surfaces classicsoldier

Adjustable size for wheels, Saw, Blade, Propellers terrorking

Assign more keys to on singe block jqkandrei

In game/ in forum announcement board for posting game update index and notify upcoming updates & game dev progresses bloodstain

Visual firing lines for cannons (so you can aim) obliterator2

the depth of field looks so nice so I won't turn it off, but it's a bit annoying having it permanently activated near the floor when you're away from the vehicle obliterator2

Mount camera on exising block for tps or fps viewtairuse

Better camera control classicsoldier

hill climbing floor grip block obliterator2

Different sized gears integrated with wheels (attach a gear to an unpowered wheel to link them up) obliterator2

different blocks and braces that vary in mass and strength andyp

Rope (no elastic ability) for constraction or contraption
elastic cords for ballista
andyp

Stronger wood blocks andyp

More type of gears xxjetterxx

Add an unpowered, anchored gear. One that doesn't turn terrorking

Rails for supporting objects that pivot sirfishticuffs

Cog throttle & rotation speed adjustion during usage cass

Braces are too strong, need editing classicsoldier

Item sometimes have too much vertical momentum classicsoldier

Cogs with different size/shapes classicsoldier

Killable Core Block hobbes

weapons should damage your own parts hobbes

Killer Rabbits as enemy type vindel

allow player to save in cloud folders(eg Dropbox, skydrive, ***steam cloud save) to sync it between different computers mitaywalle

Ability to map keys to gamepads/non-keyboard buttons sirfishticuffs

Realistic gyroscope physics, so that spinning objects dont fall over sltrhx

Bind multiple keys to blocksobliterator2

Option to view vehicle stress (just to see what might need reinforcing if the device falling apart a lot) obliterator2

Easier keymapper slider increments, maybe add an text box for more precise input hobbes

More additions to the current block controls zombelas1

Measureing mechanics to measure distace between mouse and object stones

See mass on each block in build mode tairuse

Block Picker (convenience tool) twl

Bind a camera save to a block so player can switch to that camera later when driving the machine twl