Speaking of which, the APEX bit is harder than a crude sexual metaphor.
Also, there's a mod for DoW Soulstorm that adds... almost everything. Titanium Wars, which requires three downloads (the mod, the patch to the mod, and an editor that lets you change the maximum memory allocation to "modern game levels" so it doesn't crash). Firstly it doubles the population caps (including Orky Population, Vehicle Population etc). Buildings get x4 HP, to make them tougher - firstly as an anti Zerg Rush countermeasure, and partly because 40k fluff tends to bang on about the walls being 5' thick and made out of condensed Space Marines. Weapon ranges have been tinkered with a little bit.
Aircraft have been taken out due to the whole "What are they, ground-level hovercraft?" thing. That's fair enough, and if the tabletop did that for everything that couldn't conceivably be used as an assault helicopter.
Then the armies get... some new stuff.
- ImpGuard: conscripts, more officers, mortar teams that can upgrade to bazookas, full weapon options for Sentinels and LMR tanks, some of the LMR main cannon variants, three extra Superheavies including the plasma one, and the artillery tanks, possibly the Eversor Assassin and Warhound Titan
- Space Marines: Vindicator, Venerable Dreads, Land Raider Crusader/Redeemer, Warhound Titan
- Sistaz: Ordo Hereticus Inquisitor + Lord + Retinues, the three Land Raiders, Saint Celestine, Inquisitor Krazypants, Arcoflag Squads, Retributor Squads, four or five different Sisters of Silence squads, Eversor and Callidus Assassins, Warhound Titan
- Orks: Ardboyz, Skarboyz, Big Mek Boss, Gretchin Mob, Gretchin Big Gunz, Massive Squiggoth (the previous one is no longer superheavy and 0-1), Deffdred, Battlewaggon, Battlefortress (superheavy), Kustim Deffdred (superheavy), and another big tank
- Khay-Oss: Noise/Plague/Rubric Marines, Greater Daemons of Tzeench/Nurgle/Slaanesh, Daemonettes/Bloodletters/Plaguebearers, Chaos Terminators, Chaos Dreads, Bikers, Havocs, Chaos Warhound, Vindicator
- Space Elfs: Jetbikes, Storm Guardians, Shining Spears, Wave Serpents (no awesome forcefield weapon), Shadow Weavers, Striking Scorpions, Dire Avengers, Wraithguard, War Walkers, Autarch, Swooping Hawks, Revenant Titan, Cobra Superheavy, and the weapons were updated for the Dark Reapers, and Prism Tanks can power each other up
- Spiky Space Elfs: no new units, but existing units are updated with new abilities (Reavers can zoom over units to harm them, Ravagers get to become impossible to target and get extra-power shots against Big Shit
- Tau: Mounted Massive Gnarlocs, various Elite _____ units, about 4? new types of Crisis Suit including a second commander type, Gue'la (conscripted Imperial Guard that can all take Tau special weapons), "looted" Warhound Titan, variant Hammerhead, Sniper Drones, Piranhas, Tetras
- Necrons: Special Towers, the C'tan Shards are now their own units, Massive Gauss Pylon, Annihilation Barge, Ghost Ark, the massive fuck-off penis cannon version of the Ghost Ark
- Ordo Malleus: a new faction that exists but has no Campaign mode. At its base it's a Daemonhunter Inquisition force, with Acolytes and Storm Troopers and all that. But then you can add most of Codex: Grey Knights to it.
So it's a massive project, most of which was done by one guy, because GW fans are fucking mental like that. But it's only for Skirmish mode.