Alien Arena has been released in version 7.72.4.

Alien Arena is a free, open source arena shooter in the style of Quake III and Unreal Tournament, focused on fast online multiplayer.

The new version mainly brings netcode improvements: more lag compensation for packet loss and unstable ping, sub-tick accumulation to fix movement issues at low framerates, and map downloads via HTTPS.

• Added sub-tick accumulation, to fix movement issues with low framerate and to optimize strafing
• More lag compensation for players with packet loss
• More lag compensation for players with an unstable ping
• Netcode: added sv_netdebug detailed packet info per player
• Netcode: Increased entity state buffer, to prevent packets being overwritten before having been confirmed, leading to full packet floods
• Netcode: Added resync throttling, to only send one full packet instead of 100+ on high ping
• Enhanced dynamic culling, based on the combination of entity count and connection quality
• Enable map downloads via https

Source: GitHub