AirMech updates itself a lot and it would be damn difficult to hack. Most of its stuff are all server-sided. Especially the diamonds part.. whatever you had found on youtube are all fake.
I'm actually working on AirMech myself, however, I only found two exploits.. One is earning x2 more kudos, and a diamond glitch. The whole game itself is online, I tried disconnecting and try something cheaty from there, but it would instead freeze up your game, meaning there wouldn't be any progress from then forth. On the older updates, it's possible for you glitch a singleplayer match making it to repeat the finished match, although on the current version now. That is no longer available, and it wouldn't be worth doing so. Your best bet to earn diamonds is by inviting people to AirMech. Other than that, then yea, good luck. Also, Cheat Engine would get you banned.
