Ground Zero 2.11 to 2.12
- Implement `g_quick_weap`. If set to 1, both weapprev and weapnext
  commands will count how many times they have been called, making
  possible to skip weapons by quickly tapping one of these keys. (by
  protocultor)
- Work around naggy help icons. (by BjossiAlfreds)
- Implement `g_monsterfootsteps` (by 0lvin)

Ground Zero 2.10 to 2.11
- Relicense under GPL2.
- Fix Entity used itself in rbase1 and other minor fixes. (by
  BjossiAlfreds)
- Some fixes for rsewer1. (by BjossiAlfreds)
- Fix minor AI glitches with turrets (by BjossiAlfreds)
- Fixed nagging help message in rhangar2. (by BjossiAlfreds)
- Fixed gunner grenade duck code running twice. (by BjossiAlfreds)
- Fixed wrong Tank muzzle flash. (by BjossiAlfreds)
- Implement `g_swap_speed`. This allows to skip frames of "putting down
  weapon" and "raising weapon" animations, speeding them up. (by
  protocultor)
- Several fixes to makron (by BjossiAlfreds)
- Fixed stand-ground gladiators not attacking at certain range. (by
  BjossiAlfreds)
- Fixed monsters seeing players during intermissions. (by BjossiAlfreds)

Ground Zero 2.09 to 2.10
- Implement faster weapon switching with the new 'cycleweap' command.
  (by protocultor).
- Fixes pusher delta yaw manipulation. This fixes the infamous bug were
  a player standing on a blocked elevator gets turned around (by
  skuller).
- Fix several coop related bugs with the powercubes. (by BjossiAlfreds)
- A way better fix for dead bodies obstructing elevators or falling
  through the worldmodel. (by BjossiAlfreds)
- Fix items already in water playing a splash sound at level start. (by
  BjossiAlfreds)

Ground Zero 2.08 to 2.09
- Refine the 'g_footstep' cvar to match Quake II itself.
- Implement 'g_machinegun_norecoil'. The cvar is cheat protected. (by
  De-Seppe)
- Update the entity files for rmine1, rsewer2 and rware2, fixing some
  smaller map bugs. (by BjossiAlfreds and Dremor8484)
- Fix soldiers never showing their pain skins as long as they're alive.
  (by BjossiAlfreds)
- Implement the 'prefweap' command to select a weapon by priority. (by
  protocultor)

Ground Zero 2.07 to 2.08
- Fix wrong sound for some items when activated. (by BjossiAlfreds)
- Port the 'aimfix' cvar. (by Mitchell Richters)
- Port the 'coop_pickup_weapons' and 'coop_elevator_delay' cvars.
- Fix a long standing crash occuring when exploding projectiles like
  grenates or rockets generate sound targets and a least one monster
  starts moving to one of that targets.
- Add a cvar `g_footsteps` to control the generation of footstep sound.
- Move several hard coded map fixes to entity files. Add newly
  discovered mapfixes to the entity files. (by BjossiAlfreds)
- Fix several subtile gameplay and entity handling bug. (by
  BjossiAlfreds)

Ground Zero 2.06 to 2.07
- Several fixes for subtile bugs (by BjossiAlfreds)

Ground Zero 2.05 to 2.06
- New commands: 'listentities' allows listing of entities. 'teleport'
  teleports the player to the given coordinates.
- A lot of fixes for subtle, long standing AI and game play bugs. (by
  BjossiAlfreds)
- Fix problem found by PVS studio. (analysis by demoth and fixes by
  BjossiAlfreds)
- Add back Ground Zero specific monster behaviors, lost during initial
  merge in 2008. (by BjossiAlfreds)

Ground Zero 2.04 to 2.05
- Fix the parasite not attacking the player in some situations.
- Small bugfixes and better support the the current version of the
  Windows build environment.

Ground Zero 2.03 to 2.04
- Fix a lot of potential crashes. (reported by Maarakate)
- Fix monsters running in place.
- Fix monsters not recognizing the player under some
  circumstances.
- Fix monsters getting stuck when resurrected by a medic.

Ground Zero 2.02 to 2.03
- Make gibs and debris SOLID_BBOX so they move on entities.
- Switch from an arch whitelist to an "all archs are supported"
  approach.

Ground Zero 2.01 to 2.02
- Added CMake as an optional build system.
- Fix bug with high velocities in vents in 32bit builds.

Ground Zero 2.00 to 2.01
- Coop bugfixes

Ground Zero 1.07 to 2.00
- Cleanup of the whole source, nearly every line
  was audited and touched.
- Add sanity checks to all function.
- Fix all known bugs.
- Merge all missing changes from baseq2.

Ground Zero 1.06 to 1.07
- Port 'Ground Zero' to Mac OS X.

Ground Zero 1.05 to 1.06
- Port 'Ground Zero' to Windows.
- Use randk() instead of rand(), a better PNRG.
- Fix some potential problems found by scan-build.

Ground Zero 1.04 to 1.05
- Port new savegame system from baseq2
- Reorder files to reflect the new structure of baseq2

Ground Zero 1.03 to 1.04:
- Fix a crash when a proxy mine is attached to a flying enemy
- Fix a crash in coop when multible rockets are in flight
  (by caedes)
- Reformat the console output 

Ground Zero 1.03RC3 to 1.03:
- Just version number change

Ground Zero 1.03RC2 to 1.03RC3:
- Saner CFLAGS
- Do not show the gun symbol when fov is bigger than 91 and
  cl_gun is set to 2

Ground Zero 1.03RC to 1.03RC2:
- Slightly better performance (~10 FPS)

Ground Zero 1.02 to 1.03RC:
- Fix a rare crash with the Proxy Mine Launcher (reported by
  E. Müller)
- Tesla Coils explode when touching lava or slime (reported
  by ogrish_freak [at] gmail [dot] com)

Ground Zero 1.01 to 1.02:
- Added License
- Added Readme