Play PSP ad-hoc games on PSP Relay with a PS Vita

A PS Vita can join PSP Relay while playing PSP games through Adrenaline or ARK, using the aemu plugin. That lets it play ad-hoc games with real PSPs and PPSSPP over the internet.

What you need

• 6.61 Adrenaline, or ARK standalone custom firmware, as documented by aemu.
• A working Wi-Fi connection. On the Vita go to Settings > Network > Wi-Fi Settings, connect, then run Settings > Network > Internet Connection Test.
• The latest aemu release from GitHub.

Prepare the Vita

1. In Vita Settings > Power Save Settings, disable Use Wi-Fi in Power Save Mode.
2. If you use Adrenaline, also set WLAN Power Save to Off in the XMB under Settings > Power Save Settings.
3. Apply the aemu CFW settings:

Adrenaline (Select on the XMB to open the recovery menu): CPU Speed in UMD/ISO = 333/166; Advanced > Force High Memory Layout = Disabled.

ARK Standalone (Triangle in the custom launcher > CFW Settings): CPU Clock in Game = OverClock; Use Extra Memory = Auto; Memory Stick Speedup = Off; Inferno Cache = Off.

Install aemu

1. Copy the kd and seplugins folders from dist_660_release to the root of the PSP memory stick. If you did not change Adrenaline's path, that is ux0:/pspemu.
2. If it is not already there, add this line to ux0:/pspemu/seplugins/game.txt on Adrenaline:

ms0:/seplugins/atpro.prx 1

On ARK Standalone, add this line to ux0:/pspemu/seplugins/plugins.txt:

game, ms0:/seplugins/atpro.prx, on

1. Remove ux0:/pspemu/kd/pspnet_miniupnc.prx if that file exists.

Choose a relay server and port offset

By default aemu uses socom.cc. To use another server, edit ux0:/pspemu/seplugins/server.txt. aemu documents socom.cc, psp.mgn.pub, eahub.eu, and psi-hate.com. A longer list is on the PPSSPP ad-hoc server list. Everyone you want to play with must use the same server.

If you play with PPSSPP, all players must use the same port offset. PPSSPP documentation recommends 10000. Set that value in ux0:/pspemu/seplugins/port_offset.txt.

Optional: you can override the nickname with ux0:/pspemu/seplugins/nickname.txt, which aemu notes is useful on ARK Standalone if a game does not like the nickname generated from the Vita PSN name.

Play

1. Start an ad-hoc multiplayer session in the PSP game as usual.
2. If the game lags or drops often, pick a closer relay and a less busy 2.4 GHz channel, as described in the aemu troubleshooting notes.

Sources: aemu installation, PPSSPP ad-hoc server list.