Play PSP ad-hoc games on PSP Relay with a real PSP

PSP Relay is a public ad-hoc relay that lets a real PSP play ad-hoc games with other PSPs, PS Vitas, and PPSSPP over the internet. Setup on hardware uses the aemu plugin. Official install steps cover the PSP-2000, PSP-3000, and PSP Go; they do not document the PSP-1000.

What you need

• Custom firmware. aemu supports 6.61 PRO-C (still somewhat supported) and may require 6.61 ARK-4 in later releases.
• A working Wi-Fi hotspot. Avoid special characters in the SSID. In the XMB go to Settings > Network Settings, set up an Infrastructure Mode connection, and use Test Connection (Triangle menu) to confirm it works.
• The latest aemu release from GitHub.

Prepare the PSP

1. In Settings > Power Save Settings, set WLAN Power Save to Off.
2. On a PSP-2000 or PSP-3000, go to Settings > System Settings and set UMD Cache to Off.
3. Open the recovery menu (Select on the XMB) and apply the aemu CFW settings for your firmware.

PRO-C: Advanced > Memory Stick Speedup = None; Advanced > Inferno & NP9660 Use ISO Cache = Disabled; Advanced > Force High Memory Layout = Disabled; CPU Speed > Game CPU/BUS = 333/166.

ARK-4: Custom Firmware Settings > CPU Clock in Game = OverClock; Use Extra Memory = Auto; Memory Stick Speedup = Off; Inferno Cache = Off.

Install aemu (PSP-2000 / PSP-3000)

1. Copy the kd and seplugins folders from dist_660_release to the root of the memory stick (ms0:/).
2. If it is not already there, add this line to ms0:/seplugins/game.txt on PRO-C:

ms0:/seplugins/atpro.prx 1

On ARK-4, add this line to ms0:/seplugins/plugins.txt:

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

1. Open ms0:/seplugins/hotspot.txt and write the SSID of your hotspot.
2. Remove ms0:/kd/pspnet_miniupnc.prx if that file exists.

PSP Go

Follow the same CFW and network steps, but copy kd and seplugins to both ms0:/ and the internal storage ef0:/. Enable the plugin in both plugin lists (use ef0:/seplugins/atpro.prx on the internal list). Write your SSID in both ms0:/seplugins/hotspot.txt and ef0:/seplugins/hotspot.txt. Remove pspnet_miniupnc.prx from both kd folders if it exists.

Choose a relay server

By default aemu uses socom.cc. To use another server, edit ms0:/seplugins/server.txt (and ef0:/seplugins/server.txt on a PSP Go). aemu documents these public relays:

• socom.cc — Socom Adhoc Server (France)
• psp.mgn.pub — Madness Gaming Network (Alaska, USA)
• eahub.eu — EA Nation Hub (France)
• psi-hate.com — PSP Online (Minnesota, USA)

A longer list is on the PPSSPP ad-hoc server list. Everyone you want to play with must use the same server.

Port offset

If you play with PPSSPP, all players must use the same port offset. PPSSPP documentation recommends 10000. Set that value in ms0:/seplugins/port_offset.txt (and ef0:/seplugins/port_offset.txt on a PSP Go).

Play

1. Connect the PSP to the hotspot you wrote in hotspot.txt.
2. Start an ad-hoc multiplayer session in the game as usual.
3. If the game lags or drops often, pick a closer relay and use a clean 2.4 GHz channel, as described in the aemu troubleshooting notes.

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