It took me a LONG time to figure out number 31, then I got to 52 and was like "Wtf!!!!!!??" I looked up the answer on google for the answer to #52 and turns out it was a guess i gave for #31 hehe. It's a little challenging to find the difference between round and straight lines xD.
How to farm upgrade points: Requirements: Vulcan Cannon and Nuke ability. Recommended to have a pistol for high mobility and some points in damage, armor and speed to make the grinding easier and faster. All you have to do is farm wave 39, not many zombies and doesn't take long to kill the two bosses. Use nuke to take out all near zombies and most health from boss zombies. Repeating each wave usually takes 20-25 seconds and gives u 8 upgrade points. If you are having problems killing the bosses, switch to pistol to run away then switch back to vulcan cannon, even though I don't need to :p. Good luck @ wave 45.
Rated 1 star for not loading. Spent 20 minutes waiting for it to load and refreshed a few times, nothing worked. Too bad though, I would of gave it a better rating if it worked =L..
Played against two players today (3rd day playing, lvl 9 atm) and encountered my first hackers. Some guy name SuperSatinSwagger and another guy I couldn't remember. They were same lvl as me and they shot through boxes, mounts and practically everything. The map was coridor and i remember satin having his pistol and shooting through the metal killing everyone, his weapon did not go through it, just his bullets. REALLY pisses me off....
Just as the top comment (Gimnbo) says the game can be ironic, I want to point out that the music from main menu is also from the game 'Destroy All Humans.' lol :p
Nelly died a few times on the way, so "just in case," i'm exiting out of the credits so I don't see something like the father shooting her lol. Actually, i wouldn't laugh out loud, i'd punch my monitor xD.
"solder selection is frequently ignored" -abyssoft. I couldn't agree more. Theres sooooo many complaints i have due to not being able to pass the first lvl on EASY. The biggest problem I had was having my soldiers being stupid as hell. If my soldier has full ammunition and is occupying a space next to the amo tile, he should move. If i tell my soldier to move to this tile, he should, not get the "No Way!" option. And last, if i click a soldier, he is selected, not 1434124 clicks til he is. It's annoying.
 "Stealth Hunter 2"){kind=icon}
 "Mega Mash"){kind=icon}
 "extreme chatroom"){kind=icon}
 "Axon"){kind=icon}
 "The Pointless Game of a number"){kind=icon}
 "Z-Rox"){kind=icon}
 "Zombie Madness"){kind=icon}
 "Pirates of the Stupid Seas!"){kind=icon}
 "Zombie Misfits"){kind=icon}
 "Decision"){kind=icon}
 "TDP4 Team Battle"){kind=icon}
 "Shattered Colony: The Survivors"){kind=icon}
 "Tyrant"){kind=icon}
 "Papa's Pancakeria"){kind=icon}
 "Awaken: Front Line"){kind=icon}
 "Nelly"){kind=icon}
 "Burrito Bison Revenge"){kind=icon}
Good job :)