P2P releases can sometimes encounter startup errors. Based on official known issues :
To ensure the game runs stably, your system should meet or exceed these official requirements : Minimum of 4 GB RAM (8 GB strongly recommended). ArmA 3 v2.10.149954-P2P.torrent
Getting Started – Arma 3 - Bohemia Interactive Community Wiki P2P releases can sometimes encounter startup errors
The update typically includes various platform stability improvements and engine optimizations. P2P (Peer-to-Peer) releases like this often include all previously released DLCs and expansions (such as Apex, Contact, or Creator DLCs) pre-applied to the build. ArmA 3 v2.10.149954-P2P.torrent
Arma 3 is a Steam platform exclusive game and can be bought on the Arma 3 Steam page. Bohemia Interactive Community Wiki