Played on normal.
The grenade flying drone is new to me.
Discovered the Awoken easter egg.
Managed to get the 7th gun (Also Railgun) and meet the homing rocket mech but at some point, the game crashed in that area where the 2 homing rocket mechs were above a building (The one with the cyan key door) while I was using the gyro gun at one of the mechs.
I had saved at that point at least, but then it happened again: Same place with the same weapon and enemy.
I reached the end of the final level without even facing the mechs just because of what happened.
Still I had a lot of fun.