• Fix "use accuracy from last bullet fired earlier" glitch @Vaqtincha (#662);
• Bot fixes @Vaqtincha (#659);
• Add new CVar sv_allchat @wopox1337 (#665);
• API:
  • Implement CBasePlayer::Observer_SetMode() hook @Lopol2010 (#663);
  • Implement player Pain, DeathSound and JoiningThink hooks @fl0werD (#607);
  • Implement CBasePlayer::Observer_FindNextPlayer() hook @francoromaniello (#667);
  • Implement CGib::SpawnHeadGib() and CGib::SpawnRandomGibs() @FEDERICOMB96 (#650);
  • Implement CCSEntity::FireBuckshots() @FEDERICOMB96 (#651);

Full Changelog: 5.20.0.525...5.21.0.534