Greetings commanders,

This week, we are focusing on three heavy hitters moving through our vehicle pipeline: the American M103 heavy tank, Germany’s E-100 super-heavy tank project, and the proposed StuG E-100 assault gun concept.

As with our previous dev logs, you will find a concise historical summary for each vehicle, some helpful context while you wait to get them in your garage, and a look at our Art Team’s latest work.

M103 Heavy Tank

Entering service in 1957, the M103 was the United States’ Cold War answer to the heavy tank problem, built around the 120 mm M58 gun and operated by a five-man crew with two loaders to handle the large ammunition. Around 300 vehicles were produced from the earlier T43 program, with upgrades and redesignations following early testing and refinement.

In Steel Aces, the M103 is built to be a true long-range heavyweight. It rewards disciplined positioning and lane control, punishing exposed targets with high-impact fire. It is not a brawler you throw into bad angles alone, but in a supported push or a defensive hold, it becomes a serious problem for the enemy team to solve.

E-100 Super-Heavy Tank

The E-100 was a late-war German super-heavy tank project that never reached completion. By the end of the war, only an unfinished chassis existed, and it was captured and later transported to the United Kingdom before being scrapped in the post-war period.

On the Steel Aces battlefield, the E-100 is all about presence and commitment. It is a slow, deliberate vehicle that forces decisions, either the enemy respects the space it controls, or they risk being caught out of position. The key is planning your route early and working with teammates, because once you choose a lane, switching plans quickly is not an option.

StuG E-100 Assault Gun

Alongside the E-100 tank concept, German engineers also explored an assault gun style vehicle on the E-100 chassis, intended to mount a very large anti-tank weapon in a fixed casemate. Surviving documentation points to a gun mount blueprint for a 15 cm StuK L/68 dated July 4, 1944, with the overall project falling under the wider late-war super-heavy program that was ultimately cancelled.

In Steel Aces, the StuG E-100 is designed as a specialist sledgehammer. Expect massive threat potential from the front, balanced by the classic assault gun limitations: restricted firing angles, reliance on smart positioning, and a real need for spotting and close protection. If you set it up correctly, it can lock down an approach and make the enemy pay for every meter.

That’s the wrap up for this heavy metal showcase. As always, let us know on Discord what you think of these vehicles and tell us what others you would like to see in the game.

The Steel Aces Team