with our impending live launch, here's my attempt at putting together a quick reference list of what may be good knowledge concerning our deviations from the vanilla NWN 2 game! Rotku is doing a fine job piecing together proper documentation on the Wiki, and the Player Administration will release a sparkling brand new APM soon, but here's the quick rundown for the instant gratification crowd

Let's just jump right into it:
Playable Races
The only races that are not (yet) free to pick from the start are planetouched - Aasimar, Tiefling, Genasi. These are pending Thangorn's Tiefling testing proposal and further Admin debate. It is likely they will be added at a later date.
Level Adjustment
Level enhanced races are supported, and will follow the NWN 2 vanilla system. Please bear in mind that the infrastructure to support them may not be in place on our first live server, Silverymoon, and also strongly consider sending in a bio for approval by the local DM team where you wish to play.
Core Classes
ALFA supports all core classes from the start, with two exceptions:
Favoured Souls are not available for the live start, but principally supported. It is our strong hope their adjustments, balance and story wise, will be finalised within the first week after live and then be cleared for creation.
Warlocks are not available for the live start, but principally supported. We hope to address all outstanding concerns once Favoured Souls have been released.
Spirit Shamans are available for the live start, but they may be subject to later changes in their features. So they are cleared for creation, but you would have to expect the possibility of later adjustments.
Of course, also keep in mind that ALFA expects strong roleplay for the core classes - a cleric must be within the permittable alignments of their deity, a druid has to follow a nature deity, and so on - luckily, NWN 2 already shuttles characters along the proper choices there

Prestige Classes
There is no complete list of adjustments and alterations to prestige classes yet, however, as they are not important for a live start, this is not going to delay our launch. When planning for a PrC, please let roleplaying concerns and the development of your character drive your decisions, aiming for one from the first level may not be in spirit with ALFA's approach for hardcore roleplaying.
That said, you can expect that Frenzied Berserkers and Red Dragon Disciples will not become available in ALFA.
Feats
ALFA altered the following feats:
- Able Learner
This feat is available at character level one only. - Circle Kick
This feat is unavailable in ALFA. - Dash
This feat is principally unavailable in ALFA, but due to technical limitations, can be selected at level 1. Characters that are created with it can expect to lose it, though (no, they're not going to get accused of trying to exploit anything - we're sorry we can't offer any clean technical solution at this point).
- Mind over Body
In addition to its hit point benefits, this feat will give +1 armour class, in the form of an ooc no drop, no sell item the character will receive when leaving the start area. - Resistance to Energy (acid, cold, fire, lightning, sonic)
All instances of this feat are unavailable in ALFA. - Toughness
This feat is available at character level one only.
This is what we've done to skills so far:
- Synergies
Where ALFA uses its own coding to determine the result of a skill check, skill synergy boni apply. Sadly, we cannot yet make them available across the bank. - Heal
ALFA's heal skill follows the 3.5 rules as best as we can. The NWN 2 instant hit point recovery kits will not be available - if you see them, please kindly inform your local DM team.
- Set Trap
This skill is unavailable in ALFA. You can currently still take ranks in it pending a later fix, but you will not find traps to be used in conjunction with it - if you do, please kindly inform your local DM team.
- Use Magic Device
This skill works according to 3.5 rules for scroll activation.
Animal Companions and Familiars
Currently we have no changes for these, but there may well be some further down the road.
Cleric available Domains and Domain Spell Lists
Same - none yet, but expect some in the future. Of course, remember - in ALFA, you are only supposed to select clerical domains that are actually supported by your deity.
Spells
Once again, due to the fixes Obsidian adopted from the wider community, ALFA has not yet rolled out any alterations of its own - there are certainly going to be some, however.
Fun
Is now mandatory.
So... I hope that satisfies at least some curiousity. I'll try to help with further questions as I can, of course.
Cheers,