Hi!
Chaos Titans
They use the same rules for Imperial titan crew skills and titan upgrades (when I make the lists I will change the names and flavor text of course), However each time a chaos titan receives an honor, there is a change the chaos gods are watching and a chaos reward is granted. But the chaos gods are fickle as well as unpredictable, so what is obtained is not certain....
When you receive an honor roll a d6. If the number is equal or LOWER than the amount of honors accrued a chaos reward is obtained (at the highest level a reward is automatic).
If a chaos reward is gained, you get the one equal in number to your honors. So if you have one honor and get a reward you get a chaos tail (number 1). If you have 4 honors and get a reward you get number 4 Soul eternal. Note you get EXACTLY the one for your number of honors. You don't get to select number three if you have 4 or more honors. Chaos gods demand you accept their gifts as IS!
Chaos Rewards
In addition to the extra VP yielded upon destruction for honors, additional VP are awarded for chaos reward equal to the number on the table to gain chaos rewards (I made them in increasing power, so the last ones are whoppers!!!)
1. Chaos tail. The titan grows a tail that gives +2 to CAF and a shooting weapon with the battle cannon stat line. Both features cannot be used in same turn. If you already have a tail increase caf to +4 and double attack dice for firing weapons, +1 to hit and -1 save modifier bonus.
2. Chaos Head. The head of the titan changes to reflect the crews preferred chaos god. Players choice.
Khorne: Close combat bonus +3, re-roll failed close combat dice (cumulative with crew upgrade) non-titan units within 25 cm must roll morale or fall back.
Tzeentch: Ray of change. Use Battlecannon stat line with 4 attack dice. Any unit hit and failing its armor save gets transformed into pink horrors if of lesser than "knight class". Units of knight class are transformed into Lords of Change. Titans/praetorians are unaffected.
Slannesh: Soporific mist. All units within 25cm lose one close combat die (roll 1d6 instead of 2) unless a psychic save is made. Also if the titan wins close combat the tongue lashes out and attempts to snap one weapon off (players choice). Roll on damage table immediately.
Nurgle: Stream of Corruption. Use the large flame template. Effects as Great unlean one stream of corruption.
If you already have a head add these powers as a bonus to what you already have (cumulative).
3. Attuned to the warp. The titan, given the gods capricious desires, may open a rent into the warp and may move through it a distance equal to its charge move. When it travels thusly it is immune to any kind of reactionary fire. If the titan chooses to charge out of the warp and engage in close combat it gains a bonus +1d6 to close combat rolls.
The ability is not reliable however. Roll 1d6 to see effects when a warp hole is opened.
1 The chaos titan is sucked into the warp and is delayed. The titan spends the rest of the turn in the warp and may exit the next turn.
2-3 The warp tunnel is opened but leads to the wrong place. Roll for scatter direction and roll 4d6 for distance.
4-5 The warp tunnel is stable and opens on desired location
6. Not only does it open as intended, but when the attack is completed roll for scatter with 4d6 and the titan moves a second time as the warp whisks the titan to safety.. or even greater doom....
4. Soul eternal. The crew and titan are one. They are fused in some unholy fashion. When the titan is destroyed you still roll for crew survival as the soul can escape imminent death. If it survives and inhabits another titan it transforms it anew into the lost titan! Crew AND titan upgrades are KEPT!
5. Essence of Chaos. The reactor churns living souls. Its power is of such potency you gain the benefits of increased ammo feed, increased shielding and turbo weapons!
6. Daemonhood! The titans turns into a giant daemon of chaos undivided. Titan gains ALL the powers of greater demons. It contributes to the chaos deck like a greater demon would and can use chaos cards like a lord of battle. Psychic vulnerabilities of demons apply.
I made these REALLY over the top. But since are basically level dependent, you'll mostly encounter heads and tails. If you run into a daemon titan and didn't bring a psi-titan, you get what you deserve....

Thoughts and Comments?
Primarch