I haven't tested it this way, but you might be able to change your achievements section of your game.prefs file to something like this and have it unlock everything:
achievements = {
Items = {
'AchievementAEHeal',
'AchievementAEMana',
'AchievementAERegen',
'AchievementCooldown',
'AchievementDamage',
'AchievementDeathReduction',
'AchievementFinger',
'AchievementFlurry',
'AchievementGoldIncome',
'AchievementHealth',
'AchievementMana',
'AchievementManaLeech',
'AchievementMinionBuff',
'AchievementMinionDamage',
'AchievementMinionEvasion',
'AchievementMinionHealth',
'AchievementMinionInvis',
'AchievementMinionMeta',
'AchievementMovement',
'AchievementPotion',
'AchievementPure',
'AchievementRefreshCooldowns',
'AchievementRunSpeed',
'AchievementSnare',
'AchievementTeleport',
'AchievementVision',
'AchievementXPIncome',
},
Points = 90000,
}
They also currently have a function that reads from their server, and another that writes to it to store your data, but I didn't check as to when it calls them.