Sony has detailed its "one price" Vita/PS3 cross-play offers.
Cross-play is possible with PS Vita launch games MotorStorm RC, Hustle Kings, Top Darts, and WipEout 2048.
When you buy MotorStorm RC you will be able to play it on PS3 and Vita at no additional cost, Sony said.
When you buy Hustle Kings and/or Top Darts for Vita, you get the PS3 versions for free. If you already own these games on PS3, you can download the Vita version for free.
If you buy WipEout 2048 and you already own WipEout HD and the HD Fury DLC on PS3, you can download them as DLC packs for free when they launch on Vita later this spring.
And DLC bought for the PS3 version of Ultimate Marvel vs. Capcom 3 can be used on the Vita version for free and vice versa.
"Those who already own any of these titles for their PS3 systems will be able to download this same content to their PS Vita systems for free, and vice versa," Sony said. "There is no need to pay for the same content twice, highlighting the importance of the relationship between PS3 and PS Vita.
"But it is not only the ability to buy these games for one price and access them across both platforms that makes the relationship between PS3 and PS Vita so important."
WipEout 2048 owners on Vita will be able to race against WipEout HD owners on PS3 across four tracks at launch. This is separate to the offer detailed above.
Hustle Kings offers turn-based multiplayer between Vita and PS3 at launch. UMVC3 lets you use the Vita as a controller to play the PS3 version.
Vita launches in Europe on Wednesday, 22nd February.