God Mode
Alter game files at your own risk and always make backups. Open DefaultGame.ini in the game folder (Alice2\AliceGame\Config) in a text editor. Save the file after you are done and start the game.
For God Mode: In line 176 you can find Damage Mutltiplier for "Easy" it's DamageMultiplierArray[0] = 0.75. To activate godmode you have to set your line to = 0.0
For example: DamageMultiplierArray[0] = 0.0
Weapon Damage: You can also set the Weapon Damage Multiplier AliceWeaponDamageMultiplier[0] = 3.0, just change the =3.0
Weapon Upgrades: Down from line 262 you can change the upgrade cost by changing this line:
WeaponUpgradeToLevel2XPCost[0]=150 to, say, WeaponUpgradeToLevel2XPCost[0]=15